fan_zou 发表于 2017-11-17 19:17:04

A568A568M-17a

A568A568M-17a Standard Specification for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolledand Cold-Rolled, General Requirements

admin 发表于 2017-11-20 18:26:05

谢谢您的分享，金币已奖励!
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