liuxilin1215 发表于 2017-10-9 19:29:57

ISO/TS 12512-2017 Glass reinforced thermosetting plastic (GRP) pipes Determinati

ISO/TS 12512-2017 Glass reinforced thermosetting plastic (GRP) pipes Determination of initial specific ring stiffness using segment test species cut from a pipe


killer007 发表于 2017-10-10 17:17:02

很感谢,虽然不是原版的,但是用着还可以。

qwe369 发表于 2017-10-11 15:53:55

顶!!!!!!!!!!!!!!!!!!!!!!!!!!!!:)

admin 发表于 2017-10-12 09:31:37

谢谢您的分享,金币已奖励!
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