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发明名称
摘要
申请公布号
CS159692(B1)
申请公布日期
1975.01.31
申请号
CS19720003059
申请日期
1972.05.06
申请人
发明人
分类号
B24B47/22;(IPC1-7):B24B47/22
主分类号
B24B47/22
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代理人
主权项
地址
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