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发明名称
Oil well pump control
摘要
An oil well pump control for regulating operation of a pumping apparatus such as a pumping jack through a timing system which is actuated by the fluid pulses or surges that result from the pumping action of the pump.
申请公布号
US4874294(A)
申请公布日期
1989.10.17
申请号
US19880198501
申请日期
1988.05.25
申请人
KARG, THOMAS A.
发明人
KARG, THOMAS A.
分类号
F04B49/06
主分类号
F04B49/06
代理机构
代理人
主权项
地址
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