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发明名称
SUBSTRUCTURE FOR MOUNTING DRILLING EQUIPMENT ABOVE HOLE MOUTH
摘要
申请公布号
SU1633085(A1)
申请公布日期
1991.03.07
申请号
SU19884454663
申请日期
1988.07.05
申请人
VNII METODIKI TEKHNIKI RAZVEDKI
发明人
GORELIKOV VLADIMIR G,SU;MIKHAJLOV GENNADIJ V,SU
分类号
E21B19/00
主分类号
E21B19/00
代理机构
代理人
主权项
地址
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