ygs67 发表于 2015-11-18 14:38:20

ASTM A304-11

ASTM A304-11 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements

admin 发表于 2015-11-19 10:25:22


谢谢您的分享,金币已奖励!

hwangjbo 发表于 2022-8-22 08:59:21

奇文共欣赏 疑义相与析
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