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ASTM B249/B249M-2018 锻制铜和铜合金条材、棒材、型材及锻件一般要求规格 Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod,Bar,Shapes and Forgings ASTM B249/B249M-2018 锻制铜和铜合金条材、棒材、型材及锻件一般要求规格 Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod,Bar,Shapes and Forgings

ASTM B249/B249M-2018 锻制铜和铜合金条材、棒材、型材及锻件一般要求规格 Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod,Bar,Shapes and Forgings

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