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发明名称
POWER TONG WITH DOOR JAMMER VALVE
摘要
A power tong with a cable operated door jammer valve for shutting off the hydraulic supply of a power tong when the door is opened.
申请公布号
US2011296957(A1)
申请公布日期
2011.12.08
申请号
US20100862616
申请日期
2010.08.24
申请人
FEIGEL, JR. KURT R.;BARKER MARCIN K.;UNIVERSE MACHINE CORPORATION
发明人
FEIGEL, JR. KURT R.;BARKER MARCIN K.
分类号
E21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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