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发明名称
KOHLENBOHRSCHNEIDE
摘要
申请公布号
DE2205594(B1)
申请公布日期
1973.01.04
申请号
DE19722205594
申请日期
1972.02.07
申请人
发明人
分类号
E21B10/54;(IPC1-7):E21C13/02
主分类号
E21B10/54
代理机构
代理人
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地址
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