兑水 发表于 2009-10-24 15:48:36

ASTM D 6492-1999 检测镀锌和锌/铝合金钢六价铬的标准惯例

D6492-99(2003) Standard Practice for Detection of Hexavalent Chromium On Zinc and Zinc/Aluminum Alloy Coated Steel
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