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发明名称
ROTARY-BLADE BIT
摘要
申请公布号
SU723088(A1)
申请公布日期
1980.03.25
申请号
SU19782694120
申请日期
1978.11.29
申请人
IR POLT INSTITUT
发明人
PERETOLCHIN VADIM A,SU;SHEMETOV YURIJ P,SU;DOLGUN YAROSLAV N,SU;STRABYKIN NIKOLAJ N,SU;BELYAEV ALEKSANDR E,SU
分类号
E21B10/42;E21B10/08;(IPC1-7):E21B9/02;E21B9/10
主分类号
E21B10/42
代理机构
代理人
主权项
地址
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