兑水 发表于 2009-9-10 20:29:41

ASTM A 1020-2002 锅炉，过热器，热交换器和冷凝器用熔焊碳...

A1020/A1020M-02 Standard Specification for Steel Tubes, Carbon and Carbon Manganese, Fusion Welded, for Boiler, Superheater, Heat Exchanger and Condenser Applications
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