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发明名称
摘要
申请公布号
JPS5139899(Y2)
申请公布日期
1976.09.29
申请号
JP19710090695U
申请日期
1971.10.02
申请人
发明人
分类号
B23B31/20;B23B31/24;(IPC1-7):B23B31/20
主分类号
B23B31/20
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