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编辑同志:我看了机械工业出版社出版的”先进经验报刊”“球墨铸铁的熔炼和铸造”(以下简称报刊)以及历期的“铸工”月刊,对于铜镁合金的熔铸方面行下列几个问题:
Editorial Comrades: I read the “Advanced Experience Press”, “Smelting and Casting of Ductile Iron” published by Machinery Industry Press (hereinafter referred to as the “Press”) and the monthly “Casting” magazine for the following castings of copper-magnesium alloy problem: