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发明名称
摘要
申请公布号
JPS57181553(U)
申请公布日期
1982.11.17
申请号
JP19810068710U
申请日期
1981.05.12
申请人
发明人
分类号
B24B47/20;(IPC1-7):B24B47/20
主分类号
B24B47/20
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代理人
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