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发明名称
Hydraulic pump gate apparatus
摘要
An improved, hydraulically controlled pump for coarse, viscous material such as, but not limited to, concrete, and a gate mechanism for the pump.
申请公布号
US4854838(A)
申请公布日期
1989.08.08
申请号
US19860885153
申请日期
1986.07.14
申请人
SWAIN, DAVID O.
发明人
SWAIN, DAVID O.
分类号
F04B7/02
主分类号
F04B7/02
代理机构
代理人
主权项
地址
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