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发明名称
摘要
申请公布号
GB1290124(A)
申请公布日期
1972.09.20
申请号
GBD1290124
申请日期
1971.04.19
申请人
发明人
分类号
B24B33/02;B24B33/06;B24B33/08
主分类号
B24B33/02
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代理人
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