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经营范围
发明名称
ROTARY DRILLING RIG
摘要
申请公布号
GB1515974(A)
申请公布日期
1978.06.28
申请号
GB19760015907
申请日期
1976.04.20
申请人
GARDNER DENVER CO
发明人
分类号
E21B3/02;E21B19/084;E21B19/14;E21B19/20;(IPC1-7):E21B3/02;E21B19/16
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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