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发明名称
WELL-DRILLING APPARATUS
摘要
申请公布号
SU1139820(A1)
申请公布日期
1985.02.15
申请号
SU19833641855
申请日期
1983.07.29
申请人
KY VNII STROITELNOGO DOROZHNOGO MASHINOSTROENIYA
发明人
BORISOV VLADIMIR A,SU;DIKIKH YURIJ P,SU;GOJKHMAN YAKOV A,SU
分类号
E21B7/24;(IPC1-7):E21B7/24
主分类号
E21B7/24
代理机构
代理人
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地址
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