ygs67 发表于 2015-6-17 10:01:55

ASTM A1020 A1020M-02(R12)

ASTM A1020 A1020M-02(R12) Standard Specification for Steel Tubes, Carbon and Carbon Manganese, Fusion Welded, for Boiler, Superheater, Heat Exchanger and Condenser Application

admin 发表于 2015-6-18 08:32:38

谢谢您的分享,金币已奖励
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