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发明名称
DEVICE FOR DISTRIBUTING LOAD AMONG ROTARY DRILL BITS
摘要
申请公布号
SU866106(A1)
申请公布日期
1981.09.23
申请号
SU19762333007
申请日期
1976.03.09
申请人
DOMAKHOVSKIJ ALEKSANDR V,SU
发明人
DOMAKHOVSKIJ ALEKSANDR V,SU
分类号
(IPC1-7):E21B9/10
主分类号
(IPC1-7):E21B9/10
代理机构
代理人
主权项
地址
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