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发明名称
摘要
申请公布号
NL7017596(A)
申请公布日期
1971.06.08
申请号
NL19700017596
申请日期
1970.12.02
申请人
发明人
分类号
B24B5/42;(IPC1-7):B24B5/02
主分类号
B24B5/42
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代理人
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地址
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