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发明名称
INSERTABLE DRILLING BIT FOR CORE-DRILLING TOOL WITH DETACHABLE CORE RECEPTACLE
摘要
申请公布号
SU899829(A1)
申请公布日期
1982.01.23
申请号
SU19802930323
申请日期
1980.05.26
申请人
MIKHAJLOV GENNADIJ V,SU
发明人
MIKHAJLOV GENNADIJ V,SU
分类号
E21B10/64;(IPC1-7):E21B10/64
主分类号
E21B10/64
代理机构
代理人
主权项
地址
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