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发明名称
Pilot-controlled directional valve
摘要
Pilot-controlled directional valve having two positions, an admitting position and a closing position for a hydraulic user device, such closing position can be obtained independently from the presence of a supplied hydraulic pressure.
申请公布号
US5117868(A)
申请公布日期
1992.06.02
申请号
US19890441000
申请日期
1989.11.22
申请人
WAGNER, RICHARD
发明人
WAGNER, RICHARD
分类号
B64C13/40;F15B20/00;F16K31/42
主分类号
B64C13/40
代理机构
代理人
主权项
地址
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