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The wall thickness of copper castings will change with the shape of the copper castings, which are usually called wrong box

Copper castings are a kind of comparison with common castings. In the process of production, it is easy to form some doubts a

　The copper liquid sucked from the electrolytic cell contains various impurities, so it needs to be purified before casting.

　 There are many types of copper casting molds, which can be divided into: ①Metal molds according to the processing objects

What is copper casting?　　Copper castings have different names in different places, such as copper die-casting parts, die-ca

　The skill distance theory of copper casting. Put forward by the American economist Posler, the central idea is that there i