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发明名称
Hydraulic pump jack with separable piston
摘要
申请公布号
US2782770(A)
申请公布日期
1957.02.26
申请号
US19550503003
申请日期
1955.04.21
申请人
LORIN A. LOCKARD
发明人
VANALSTYNE EARL M.
分类号
F04B47/04
主分类号
F04B47/04
代理机构
代理人
主权项
地址
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