liuxilin1215 发表于 2016-12-12 08:58:40

ASTM A336/A336M-15 Standard Specification for Alloy Steel Forgings for Pressure

ASTM A336/A336M-15 Standard Specification for Alloy Steel Forgings for Pressure and High-Temperature Parts

admin 发表于 2016-12-12 21:36:53


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