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发明名称
DRILL RIG
摘要
申请公布号
RU2077648(C1)
申请公布日期
1997.04.20
申请号
SU19904891671
申请日期
1990.11.11
申请人
KORSAKOV PETR F
发明人
KORSAKOV PETR F
分类号
E21B7/02;(IPC1-7):E21B7/02
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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