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谢谢您的分享,金币已奖励 就差这个了,原有是草稿,英文原版标准太难找了。谢谢! 你好,需要此文件,lalalalalalalalalalal
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