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发明名称
摘要
申请公布号
JPS54139020(U)
申请公布日期
1979.09.27
申请号
JP19780033418U
申请日期
1978.03.17
申请人
发明人
分类号
C21C7/072;B22D1/00;C22B9/05;(IPC1-7):B22D1/00
主分类号
C21C7/072
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