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经营范围
发明名称
POWER-TORQUE PIPE TONGS
摘要
申请公布号
US3463037(A)
申请公布日期
1969.08.26
申请号
USD3463037
申请日期
1967.09.20
申请人
SHELL OIL CO.
发明人
GLENN D. JOHNSON
分类号
B25B21/00;E21B19/16;(IPC1-7):B25B13/50;B25B13/04
主分类号
B25B21/00
代理机构
代理人
主权项
地址
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