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发明名称
Supporting and turning slip for pipes
摘要
申请公布号
US2609583(A)
申请公布日期
1952.09.09
申请号
US19490090578
申请日期
1949.04.30
申请人
BARBER WILLIAM E;ALLEN GEORGE H
发明人
BARBER WILLIAM E.;ALLEN GEORGE H.
分类号
E21B19/10
主分类号
E21B19/10
代理机构
代理人
主权项
地址
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