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发明名称
摘要
申请公布号
NL6807831(A)
申请公布日期
1969.04.01
申请号
NL19680007831
申请日期
1968.06.05
申请人
发明人
分类号
B24B23/06;(IPC1-7):B24B/
主分类号
B24B23/06
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