ffcome 发表于 2020-5-13 01:58:32

ISO 21809-3:2016

ISO 21809-3:2016
Second edition 2016-03-01


Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 3: Field joint coatings


admin 发表于 2020-5-13 09:18:02

谢谢您的分享，金币已奖励!

myyeh 发表于 2020-5-13 16:39:12

谢谢您的分享----------------------------------
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