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Trival making of the DN 20 casting valve's hollow copper-stick
Pages: 25-26
Year: Issue:  1
Journal: Valve

Keyword:  铸造工艺 工装 阀座;
Abstract: 介绍了加工阀座用ZCuZn3 8Mn2Pb2空心棒的铸造工艺及工装的技术改进
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