nguyenhung 发表于 2014-5-17 13:22:29

ISO 21809-4 Polyethylene coatings (2-layer PE)(英文)

ISO 21809-4 Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 4: Polyethylene  

admin 发表于 2014-5-17 21:47:24

谢谢您的分享,金币已奖励

countryboy66 发表于 2014-9-9 10:47:48

就差这个了,原有是草稿,英文原版标准太难找了。谢谢!

CICI617112 发表于 2017-1-6 17:02:00

你好,需要此文件,lalalalalalalalalalal
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