شیر ایمنی سطحی

Valve Image Site

 

شیر ایمنی سطحی

Safety surface valve

شیر ایمنی سطحی : شير ایمنی فشار يا PSV يكي از تجهيزات ايمني در صنعت است. كه مانع از قرار گرفتن لوله ها، شيرآلات، مخازن تحت فشار و… در شرايط فشاري بيش از فشار طراحي مي شود. بنابراين انتخاب PSV بسيار مهم بوده و بايد با احتياط كامل صورت پذيرد.
در انتخاب شیر ایمنی PSV و تعيين جزئيات آن چند سئوال مهم مطرح مي گردد:

چه نوع شیر ایمنی براي فرآيند مورد نظر ما مناسب است؟

آيا روش ساده اي براي محاسبه سايز شیر ایمنی وجود دارد كه راحت تر از محاسبات دستي باشد؟

چه نوع متريالي برای شیر ایمنی بايد انتخاب گردد تا با شرايط فرآيندي مورد نظر هم خواني داشته باشد؟
قبل از پاسخ دادن به اين سوالات و نحوه انتخابPSV بهتر است با نحوه كار PSV آشنا شويم و آشنايي با قطعات اساسPSV به ما كمك خواهد كرد كه با آگاهي كامل اين انتخاب را انجام دهيم.

تعريف شير ایمنی فشار:

طبـق استـاندارد API 520 Part 1 كه به بررسي نحوه انتخاب، محاسبه سايز، نحوه نصب تجهيزات ایمنی در پالايشگاه ها مي پردازد. در مورد شير اطمينان تعريف زير ارائه شده است: يك شير ایمنی شيري است كه توسط يك فنر بسته شده است. و با رسيدن فشار پشت شير به يك فشار استاتيكي مشخص عمل كرده و به سرعت باز مي شود. (به اين عملPOP كردن شير مي گويند) شيرهاي ایمنی معمولاً براي سيالات تراكم پذير كاربرد دارد. با مشخص بودن مساحت سطح مجرابند و اندازه نازل مي توان مشخص نمود كه چه حجم سيال از شير خارج خواهد شد. در ابتدا بايد اندازه نازل خروجي (كه اُرفيس ناميده مي شود) محاسبه گردد.

 

انواع شیر ایمنی :

  • شیر ایمنی گاز
  • شیر ایمنی درون چاهی
  • شیر ایمنی سطحی
  • شیر ایمنی پیلوت دار
  • شیر ایمنی هوا
  • شیر ایمنی بخار

انواع شیر ایمنی با مارک های مختلف اعم از:

شیر ایمنی لزر / شیر ایمنی Leser

شیر ایمنی کروزبی / شیر ایمنی Crosby

شیر ایمنی تکنیکال/ شیر ایمنی Technical

شیر ایمنی کنسولیدیدت/ شیر ایمنی Consolidated

شیر ایمنی هایسک/ شیر ایمنی Hisec

 

 

جهت دریافت اطلاعات بیشتر و اطلاع از قیمت شیر ایمنی سطحی با کارشناس فروش شیرآلات شرکت تماس حاصل فرمایید.

 

381 پیام

  1. iCQOJB Very informative blog.Really looking forward to read more. Much obliged.

  2. ZQtUHI There is obviously a lot to realize about this. I think you made some nice points in features also.

  3. uL2NJZ Say, you got a nice article.Thanks Again. Really Cool.

  4. 8mMJPT Pretty! This has been an extremely wonderful post. Many thanks for supplying these details.

  5. There is certainly a great deal to find out about this issue. I really like all of the points you made.

  6. Pretty! This was an extremely wonderful article. Thank you for supplying these details.

  7. or guest authoring on other blogs? I have a blog based upon on the same topics you discuss and would love to have you share some stories/information.

  8. It as not that I want to copy your web site, but I really like the design and style. Could you let me know which design are you using? Or was it tailor made?

  9. You made some respectable factors there. I regarded on the web for the issue and found most individuals will go along with together with your website.

  10. I think this is a real great article.Really thank you! Want more.

  11. I think this is a real great article. Want more.

  12. Just wanted to tell you keep up the fantastic job!

  13. Sweet web site , super design and style , really clean and utilize friendly.

  14. Thanks for sharing, this is a fantastic blog article.Thanks Again. Much obliged.

  15. I really liked your article post.Much thanks again. Want more.

  16. Some truly prize posts on this web site, saved to favorites.

  17. Way cool! Some very valid points! I appreciate you penning this article and the rest of the site is also really good.

  18. Just wanted to say thanks for posting this!

  19. I really liked your article.Much thanks again. Much obliged.

  20. You made some respectable factors there. I appeared on the web for the problem and found most individuals will go together with with your website.

  21. It’а†s really a great and useful piece of info. I’а†m glad that you just shared this helpful info with us. Please stay us up to date like this. Thanks for sharing.

  22. You made some good points there. I looked on the internet for the subject and found most persons will approve with your blog.

  23. I truly appreciate this article post.Really thank you! Fantastic.

  24. that should outweigh Owens touchdowns. I think all of it

  25. I really enjoy the blog post.Really thank you! Really Cool.

  26. take care of to keep it wise. I cant wait to learn much more from you.

  27. A big thank you for your blog article.Much thanks again. Really Cool.

  28. Thanks a lot for the article.Thanks Again.

  29. Major thankies for the article post.Really looking forward to read more. Really Cool.

  30. veux garder ta que le monde tot il marchait, je ne

  31. Really appreciate you sharing this post.Really looking forward to read more. Fantastic.

  32. me. Anyhow, I am definitely glad I found it and I all be bookmarking and checking back often!

  33. Wow, great blog.Really looking forward to read more. Want more.

  34. There is perceptibly a lot to identify about this. I consider you made some good points in features also.

  35. Great article post.Thanks Again. Really Cool.

  36. Really enjoyed this article post.Really thank you! Want more.

  37. I think other web-site proprietors should take this website as an model, very clean and wonderful user friendly style and design, let alone the content. You are an expert in this topic!

  38. Right now it sounds like Movable Type is the top blogging platform available right now. (from what I ave read) Is that what you are using on your blog?

  39. This particular blog is really awesome and diverting. I have picked up helluva handy things out of this blog. I ad love to visit it over and over again. Thanks!

  40. the idea beach towel should be colored white because it reflects heat away-

  41. I cannot thank you enough for the blog. Really Great.

  42. Awesome blog article.Thanks Again. Keep writing.

  43. Wow, incredible blog layout! How long have you been blogging for? you made blogging look easy. The overall look of your website is magnificent, let alone the content!

  44. Really appreciate you sharing this blog. Cool.

  45. Your style is really unique in comparison to other people I have read stuff from. I appreciate you for posting when you have the opportunity, Guess I will just book mark this blog.

  46. I think this is a real great blog.Much thanks again. Great.

  47. Great, thanks for sharing this post.Really looking forward to read more. Keep writing.

  48. There as certainly a great deal to know about this issue. I love all of the points you made.

  49. Im thankful for the article. Much obliged.

  50. I cannot thank you enough for the blog.Really thank you! Cool.

  51. Incredible points. Outstanding arguments. Keep up the amazing work.

  52. Great, thanks for sharing this blog article.Really looking forward to read more. Will read on…

  53. This excellent website really has all the information I needed concerning this subject and didn at know who to ask.

  54. Thanks-a-mundo for the blog article.Much thanks again.

  55. Really informative article.Much thanks again. Great.

  56. Thank you ever so for you blog post.Really looking forward to read more. Will read on…

  57. Looking forward to reading more. Great article post.Really thank you! Great.

  58. wow, awesome blog post.Thanks Again. Keep writing.

  59. Thanks for sharing, this is a fantastic blog post.Thanks Again. Will read on…

  60. Thanks-a-mundo for the blog.Thanks Again. Cool.

  61. Say, you got a nice blog article.Really looking forward to read more. Really Cool.

  62. wow, awesome article post.Much thanks again. Really Great.

  63. Im obliged for the article post.Really looking forward to read more. Really Cool.

  64. Im grateful for the blog article.Really thank you! Great.

  65. Appreciate you sharing, great blog.Really looking forward to read more. Cool.

  66. I cannot thank you enough for the post.Really looking forward to read more.

  67. Hey, thanks for the blog article.Really thank you! Cool.

  68. Hey, thanks for the article post.Thanks Again. Really Great.

  69. Fantastic blog. Want more.

  70. This is one awesome blog.Really thank you! Great.

  71. Great, thanks for sharing this blog article.Really looking forward to read more. Fantastic.

  72. I truly appreciate this post.Really thank you! Really Cool.

  73. Major thanks for the blog article. Much obliged.

  74. Really appreciate you sharing this blog. Will read on…

  75. Very neat article post.Much thanks again. Really Cool.

  76. A round of applause for your post.Thanks Again. Will read on…

  77. Thank you for your article post.Much thanks again. Will read on…

  78. I really enjoy the blog article. Fantastic.

  79. I really enjoy the blog.Really thank you! Will read on…

  80. I truly appreciate this blog.Really looking forward to read more. Great.

  81. Thank you ever so for you blog.Much thanks again. Will read on…

  82. Thank you for your post. Really Great.

  83. Thanks for the article. Really Cool.

  84. Major thanks for the article post.Much thanks again. Great.

  85. Im thankful for the blog article.Really thank you! Much obliged.

  86. I really like and appreciate your post. Will read on…

  87. Im obliged for the article post.Much thanks again. Much obliged.

  88. I think this is a real great article. Great.

  89. Looking forward to reading more. Great article.Much thanks again. Really Cool.

  90. I value the article.Thanks Again. Awesome.

  91. I truly appreciate this blog post.Really thank you! Really Great.

  92. I loved your article post.Thanks Again. Awesome.

  93. wow, awesome article.Really thank you! Want more.

  94. indeed, analysis is paying off. sure, study is paying off. Take pleasure in the entry you given.. sure, research is paying off.

  95. A round of applause for your article.Really looking forward to read more. Awesome.

  96. The Firefox updated tab comes up everytime i start firefox. What do i do to stop it?

  97. There as noticeably a bundle to know about this. I presume you made sure good factors in options also.

  98. J aadmire cette photo neanmoins j aen ai deja entendu certains nouveaux de meilleures qualifications?

  99. Aw, this was an exceptionally nice post. Spending some time and actual effort to create
    a top notch article… but what can I say… I procrastinate
    a lot and don’t manage to get anything done.

  100. I always used to study paragraph in news papers
    but now as I am a user of net so from now I am using net for
    articles, thanks to web.

  101. I seriously love your site.. Great colors & theme. Did you develop this amazing site yourself?
    Please reply back as I’m looking to create my own website and want
    to know where you got this from or what the
    theme is called. Cheers!

  102. Hello I am so grateful I found your website, I really found you by error, while I was browsing on Digg for something else, Anyways I am here now and would just like to say thanks for a marvelous post and a all round thrilling blog (I also love the theme/design), I don’t have time to go through it all at the minute but I have book-marked it and also added in your RSS feeds, so when I have time I will be back to read more, Please do keep up the awesome jo.

  103. Your style is very unique compared to other people I’ve read stuff from. Thanks for posting when you have the opportunity, Guess I’ll just bookmark this page.

  104. Attractive portion of content. I just stumbled upon your website and in accession capital to claim that I get actually loved account your blog posts. Any way I will be subscribing for your feeds and even I success you get right of entry to constantly rapidly.

  105. For latest news you have to pay a quick visit web
    and on internet I found this site as a best site for most recent updates.

  106. As soon as I noticed this website I went on reddit to share some of the love with them.

  107. I love it whenever people get together and share views.
    Great website, stick with it!

  108. Can I simply just say what a relief to discover an individual who really knows what
    they’re discussing over the internet. You definitely know how to bring an issue to light and make it important.
    More people ought to look at this and understand this side of
    your story. I was surprised you’re not more popular given that you certainly have
    the gift.

  109. When I originally commented I appear to have clicked on the -Notify
    me when new comments are added- checkbox and now whenever a comment is added I receive four emails
    with the exact same comment. There has to be a way you can remove me from that service?
    Thanks a lot!

  110. Whats up are using WordPress for your blog platform? I’m new to
    the blog world but I’m trying to get started and create
    my own. Do you need any html coding expertise
    to make your own blog? Any help would be really appreciated!

  111. Online usa overnight, buying in europe and best prices for real, how to get without doctor except buy online singapore. How much does cost in nz also where can you buy over the counter, where can i buy in usa and cheap uk despite price per pill.

  112. Everything is very open with a very clear clarification of the challenges.
    It was really informative. Your website is very
    useful. Many thanks for sharing!

  113. This page certainly has all the information and facts I wanted about
    this subject and didn’t know who to ask.

  114. Buy over the counter in new york http://www.ukpods.co.uk/wp-content/uploads/2017/01/pharmacy/blamy.html where to buy tablets in chennai.

  115. Order generic from canada, order cheap online uk and generic price uk, buy cheap in canada except medicine cost. Generic purchase also buy for cheap, generic canada and can i buy tablets over the counter despite what does cost without insurance.

  116. Where can I order online in canada http://www.fitnessoptions.co.uk/images/pharmacy/etinilestradiol.html online australia fast delivery.

  117. Order next day delivery, cheap pills australia and safe for sale, australia online except buy in new zealand. Uk prescription also prescription discounts, generic tablets and buy generic despite best prices for.

  118. Buy over the counter usa, for sale in las vegas and pills for cheap, over the counter france except purchase canada. Where to buy cheapest also buying online uk, buy from canada and where can i order online despite purchase.

  119. How to buy without seeing a doctor in canada http://www.gpat.co.uk/images/products/pharmacy/finax.html safe online order.

  120. For sale canada, cheapest pills online and where to buy near me, best price australia except lowest price. Tablets uk also prescribing australia, online usa and online uk despite price per pill.

  121. Buy online australia mastercard http://www.soulbeach.org/pharmacy/amoxicillin.html buy in australia store.

  122. Buy overnight delivery, cheapest generic canada and uk over the counter, buy australian except buy online next day delivery uk. Can I buy online uk also getting in canada, going over the counter and generics uk despite how to order online.

  123. Buy generic online australia, generic online overnight shipping and how much does cost in mexico, ordering generic online except purchase online uk. Where to buy usa also is ordering online safe, cost australia and buying in spain despite what does cost without insurance.

  124. Buy cheap online canada, cheapest pills and average price of in canada, cheapest usa except buy online cheap uk. Where to buy in uae also best place to buy generic, going over the counter and and over the counter drugs despite best price generic.

  125. How to get off doctor, how to buy online usa and generic price australia, buy generic online uk except buy in new zealand. Cheapest tablets also otc australia, best price on generic and tablets buy online despite buy cheap generic.

  126. Where can I buy over the counter in south africa, buy online us and online sales co uk, purchase ireland except lowest price online. Pills to buy also buying in france, buying in singapore and buy online ireland despite buy thailand.

  127. Where can I get cheap http://merced-river.com/img/pharmacy/mexan.html how much should cost per pill.

  128. Australian prices, buying generic online safe and new zealand over the counter, cheap fast delivery except where can i order. Pills purchase also usa, how much does cost in the uk and can you order online despite australia.

  129. Online canada mastercard, how to buy online usa and can you buy without a doctor, cheapest price canada except buying in italy. How much does cost in new zealand also uk over the counter, buying in singapore and where can i buy in uk despite buy thailand.

  130. Generic lowest price, tablets online shopping and purchasing in france, online prescription order except where can i buy cheap. Tablets for sale uk also for sale us, cost of in singapore and prices compare despite where to buy in the uk.

  131. Everyone loves it whenever people come together and share ideas.
    Great site, stick with it!

  132. Where can I buy online cheap, buy cheap online usa and buying in uk shops, how to get without doctor except buy generic fast shipping. Tablets uk also buy in canada, price of without insurance and order uk despite compare prices for.

  133. Bestellen belgie online, http://apotheeknederland.life/jasocal.html , online bestellen goedkoopste.

  134. Bestellen belgie goedkoop, http://apotheek-nederland.life/calixta.html , kopen online duitsland.

  135. bestilling Norge, http://bestenettapotek.life/espironolactona.html , Hvor kan du kjøpe nettbutikk.

  136. Kopen in nederland kosten, http://onlineapotheek.life/amylin.html , prijs apotheek belgie frankrijk.

  137. icke receptbelagda online, http://sverige-apotek.life/eupril.html , till salu billigt.

  138. Wat kost bij de apotheek frankrijk, http://online-apotheek.life/ranimerck.html , prijs belgie nederland.

  139. Kopen in nederland te koop, http://internet-apotheek.life/uniflex.html , pillen prijs frankrijk.

  140. Kopen bij drogist rotterdam, http://internetapotheek.life/ethipramine.html , veilig bestellen frankrijk.

  141. Kopen apotheek nederland online, http://onlineapotheker.life/mosmass.html , pillen bestellen nederland.

  142. Kopen in winkel rotterdam te koop, http://online-apotheker.life/tomoxetina.html , kopen zonder recept apotheek.

  143. uten resept i Danmark pris, http://apoteknorge.life/exipan.html , Hvor kjøpe Engelsk.

  144. online säkert göteborg, http://sverige-apotek.life/novade.html , kapslar receptfritt.

  145. online shop USA, http://sverige-apotek.life/lanodizol.html , generiska alternativ till recept.

  146. billigare alternativ till pris, http://sverige-apotek.life/antilip.html , kapslar pris.

  147. bestill billig pris uten resepte, http://nettapotek-norge.life/fluoxebell.html , kjøpe kjøp.

  148. beste sted å kjøpe Engelsk, http://nettapoteknorge.life/resochin.html , Hvor kan man kjøpe uten resepte.

  149. You ought to be a part of a contest for one of the finest blogs
    online. I most certainly will recommend this web site!

  150. Sobre o balcao receita, http://www.tomirizarry.com/wp/wp-content/farmacia/progesterone.html – precisa de receita para comprar no rio de janeiro.

  151. comprimido de medicamento, http://larsri.org/wp-content/wflogs/farmacia/oxybutynin.html – qual o preco do generico brasil.

  152. I’m impressed, I must say. Rarely do I encounter a blog that’s both educative
    and engaging, and let me tell you, you have hit the nail on the head.
    The issue is something that not enough folks are speaking intelligently
    about. Now i’m very happy that I stumbled across this during my hunt for something relating to this.
    corso excel base

  153. Excellent blog you have got here.. It’s hard to find high-quality writing
    like yours nowadays. I seriously appreciate individuals like you!
    Take care!! corso excel

  154. rendelés online rendelése, http://www.amarasdance.com/v2/wp-content/gyogyszertar/isicom.html – gyógyszertár rendelése.

  155. kde koupit bez receptu online, http://mindspeakdallas.com/wp-content/lekarna/depakote.html – tablety lekarna online.

  156. Hi there! Someone in my Facebook group shared this site with us so I came to look it over.
    I’m definitely loving the information. I’m book-marking and
    will be tweeting this to my followers! Wonderful blog and great design and style.

  157. I enjoy what you guys tend to be up too. This kind of clever work and coverage!
    Keep up the amazing works guys I’ve added you guys to blogroll.

  158. Greetings from Carolina! I’m bored at work so
    I decided to check out your blog on my iphone during lunch break.
    I really like the knowledge you provide here and can’t wait to take a look when I get home.
    I’m shocked at how fast your blog loaded on my mobile ..
    I’m not even using WIFI, just 3G .. Anyways, fantastic blog!

  159. Very nice post. I just stumbled upon your blog and wanted to say that I’ve truly enjoyed surfing around your blog posts.
    In any case I’ll be subscribing to your rss feed and I hope you write again very soon!

  160. Very good post. I will be facing many of these issues as well..

  161. You’re so awesome! I do not believe I’ve read anything like
    this before. So wonderful to find someone with a few genuine thoughts
    on this issue. Really.. thanks for starting this up.

    This website is something that is required on the web, someone with a little originality!

    Naati Translator Perth

  162. You have made some good points there. I checked on the web for more information about the issue and found most people will go along with your views
    on this site.

  163. Oh my goodness! Impressive article dude! Thank you so much, However I am experiencing troubles with your
    RSS. I don’t understand why I cannot join it. Is
    there anybody getting similar RSS issues?
    Anyone that knows the answer can you kindly respond?

    Thanx!!

  164. Very nice write-up. I absolutely appreciate this site.

    Continue the good work!

  165. Way cool! Some very valid points! I appreciate you writing this article plus the rest of the site is also very good.

  166. I blog frequently and I genuinely thank you for your content.
    Your article has truly peaked my interest. I’m going to book mark your blog and keep checking for new information about once per week.

    I subscribed to your RSS feed as well.

  167. Great information. Lucky me I recently found your site by accident (stumbleupon).

    I’ve saved as a favorite for later!

  168. Oh my goodness! Incredible article dude! Many thanks, However I am going through troubles
    with your RSS. I don’t understand why I cannot subscribe to it.
    Is there anybody having the same RSS problems?
    Anyone who knows the solution will you kindly respond? Thanks!!

  169. This site was… how do I say it? Relevant!! Finally I’ve found something
    that helped me. Kudos!

  170. Spot on with this write-up, I seriously feel this web site needs far more attention. I’ll probably be returning
    to see more, thanks for the information!

  171. You’re so interesting! I do not believe I have read anything like this
    before. So good to find somebody with genuine
    thoughts on this topic. Really.. thanks for starting this
    up. This website is something that is required on the web,
    someone with some originality!

  172. Hey, I think your blog might be having browser compatibility issues.
    When I look at your blog in Chrome, it looks fine but when opening in Internet Explorer, it has some overlapping.
    I just wanted to give you a quick heads up! Other then that,
    amazing blog!

  173. Next time I read a blog, I hope that it won’t disappoint me as much as this
    particular one. I mean, I know it was my choice to read, nonetheless I really believed you would probably have something useful to talk about.

    All I hear is a bunch of complaining about something that you can fix if
    you weren’t too busy searching for attention.

  174. It is not my first time to visit this web site, i am visiting this web site dailly
    and get fastidious information from here every day.

  175. I simply couldn’t depart your website before suggesting that I
    actually enjoyed the standard info an individual supply
    to your visitors? Is gonna be again ceaselessly to investigate cross-check new posts

  176. If you want to get much from this article then you have to apply such techniques to your won website.

  177. you’re in point of fact a excellent webmaster.
    The site loading velocity is incredible. It kind of feels that you’re doing any distinctive trick.

    In addition, The contents are masterpiece. you’ve done a magnificent task in this subject!

  178. What’s up mates, its enormous post about cultureand completely explained, keep it up all the
    time.

  179. Ahaa, its nice conversation concerning this post at this
    place at this weblog, I have read all that, so at this time me also commenting at this place.

  180. Just want to say your article is as astonishing. The clearness in your post is simply nice and i
    could assume you’re an expert on this subject. Well with your permission allow
    me to grab your feed to keep up to date with forthcoming post.
    Thanks a million and please carry on the gratifying work.

  181. Awesome blog! Do you have any recommendations for
    aspiring writers? I’m hoping to start my own blog soon but I’m a little
    lost on everything. Would you propose starting with a
    free platform like WordPress or go for a paid option? There are so many options
    out there that I’m completely overwhelmed .. Any recommendations?
    Thanks!

  182. These are genuinely wonderful ideas in on the topic of
    blogging. You have touched some good factors here.
    Any way keep up wrinting.

  183. Acheter sans ordonnance en suisse http://inesrojo.com/swf/pharmacie/cordarone.html pas cher strasbourg.

  184. tabletten gunstig kaufen http://mistera.co.uk/userfiles/apotheke/diciclomina.html kaufen gunstig auf rechnung.

  185. En pharmacie france sans ordonnance http://ajausa.f2hosting.co.uk/wp-content/pharmacie/gestinyl.html peut on acheter dusans ordonnance en Espagne.

  186. Do you mind if I quote a couple of your posts as long as I provide credit and
    sources back to your site? My website is in the very
    same area of interest as yours and my users
    would really benefit from a lot of the information you
    present here. Please let me know if this okay with you.

    Thank you!

  187. Diario é seguro http://eastdevonremovals.co.uk/SpryAssets/farmacia/minipress.html se puede comprar sin receta en farmacias en España.

  188. En belgique sans ordonnance http://dancemax.co.uk/wp-includes/pomo/pharmacie/micardis.html peut on acheter duen Espagne sans ordonnance.

  189. Way cool! Some extremely valid points! I appreciate you penning this write-up and also the rest of the site is very good.

  190. Precio en farmacia mexico http://ruthtittensor.co.uk/css/farmacia/ospamox.html como comprar en una farmacia Peru.

  191. siti sicuri per acquistare generico http://thehouse.florist/resources/2058/farmacia/deroxat.html generico senza ricetta medica.

  192. I enjoy, cause I discovered exactly what I was looking
    for. You have ended my 4 day lengthy hunt! God Bless you man. Have a nice day.
    Bye

  193. Post writing is also a excitement, if you be acquainted with after
    that you can write or else it is complex to write.

پیام خود را ارسال کنید

نشانی ایمیل شما منتشر نخواهد شد.