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黄铜管定义与材质
普通黄铜用"H"加基本元素铜的含量表示,如:68铜表示为H68,65铜表示为H65,H62同理。 黄铜管因其独特的物理和化学性质,在工业领域有看厂泛的应用 ...
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Released from custody
Switch 2 to launch in June
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US ambassador to NATO
Wins WI Supreme Court race
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Honors 'Women of Courage'
Multi-year deal with Meta
SCOTUS sides with FDA
Death sentences commuted
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