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发明名称
HARD-ALLOY BIT
摘要
申请公布号
SU848565(A2)
申请公布日期
1981.07.23
申请号
SU19752130901
申请日期
1975.05.04
申请人
GNI PI UGOLNOJ PROMY "UKRNIIPROEKT"
发明人
ASYCHENKO EVGENIJ I,SU
分类号
E21B10/58;(IPC1-7):E21B10/58
主分类号
E21B10/58
代理机构
代理人
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地址
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