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经营范围
发明名称
DOWNHOLE DRILLING MOTOR
摘要
申请公布号
GB9125527(D0)
申请公布日期
1992.01.29
申请号
GB19910025527
申请日期
1991.11.29
申请人
DRILEX SYSTEMS INC
发明人
分类号
E21B4/02;F01C1/10
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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