文中指出了采用冷挤镦工艺代替切削加工生产铜管接头的优点。
In this paper, the advantages of the manufacturing on the cutting copper tube joint with the cold extrusion heading technology are pointed out.
研究试制了一种用于黄铜管道、水龙头和管接头等饮用水系统用零件的表面脱铅的脱铅试剂。
In this paper, a new kind of reagent which is used in leaching lead from surface of brasses in drinking water systems is studied, such as pipes, fittings and faucets.
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