Wrot coper is exclusively used for fittings.

铜专门用作配件材料。

The zinc coper alloy pouring, the alloy constriction and supplement pouring;

锌铜合金灌铸、合金收缩及其收缩孔补灌温度试验成果；

Wrot copper performs well in high temperature applications and is easily joined by soldering or brazing. Wrot coper is exclusively used for fittings.

在高温环境下，铜也表现很好，而且易于通过焊接或钎焊进行连接。铜专门用作配件材料。

The sample is treated with hydrochloric acid and hydrogen peroxide. The analytical conditions have been studied. The elements of coper, iron and zinc can be determined in the presence of lead and tin.

样品采用盐酸和过氧化氢分解，对测定条件进行了探讨，不用分离保险丝中的主要成分铅和锌，直接测定铜、铁、锌。