Pilot operated free return resistance valve,申请号US19490135962-传众专利搜索

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发明名称	Pilot operated free return resistance valve
摘要
申请公布号	US2656854(A)	申请公布日期	1953.10.27
申请号	US19490135962	申请日期	1949.12.30
申请人	THE OILGEAR COMPANY	发明人	DOUGLAS JAMES K.;DOUGLAS WILLIAM G.
分类号	F16K17/10;G05D16/10	主分类号	F16K17/10
代理机构		代理人
主权项
地址

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