兑水 发表于 2009-9-8 07:48:26

ASTM A 609-1991 碳素钢,低合金钢和马氏体不锈钢铸件...

A609/A609M-91(2002) Standard Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel, Ultrasonic Examination Thereof
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