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发明名称
ROTARY-BIT DRILL
摘要
申请公布号
SU866105(A1)
申请公布日期
1981.09.23
申请号
SU19782649350
申请日期
1978.07.28
申请人
SP K BYURO N-PROIZV OBEDINENIYA "GEOTEKHNIKA"
发明人
SMIRNOV VYACHESLAV G,SU;TRAVKIN VITALIJ S,SU
分类号
E21B10/22;(IPC1-7):E21B9/08
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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