[国外标准] ASTM A304-05e2 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenab
[国外标准] ASTM A304-05 Carbon andAlloy Steel Bars Subject to End-Quench Hardenbility Requirements
[国外标准] ASTM A304-04
[国外标准] ASTM A304-02