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发明名称
摘要
申请公布号
PL94354(B1)
申请公布日期
1977.07.30
申请号
PL19740169311
申请日期
1974.03.05
申请人
发明人
分类号
B24C7/00;(IPC1-7):B24C7/00
主分类号
B24C7/00
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代理人
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地址
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