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发明名称
Pipe pushing mechanism having a floating gripper
摘要
申请公布号
US3227419(A)
申请公布日期
1966.01.04
申请号
US19640371370
申请日期
1964.06.01
申请人
LACKEY JOSEPH A
发明人
LACKEY JOSEPH A.
分类号
E21B7/04
主分类号
E21B7/04
代理机构
代理人
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