Expansive fluid-actuated pilot-controlled valve mechanism for motors of reciprocating pumps,申请号US19380186058-传众专利搜索

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发明名称	Expansive fluid-actuated pilot-controlled valve mechanism for motors of reciprocating pumps
摘要
申请公布号	US2183538(A)	申请公布日期	1939.12.19
申请号	US19380186058	申请日期	1938.01.21
申请人	DAVID BUTLER FRANK	发明人	BUTLER FRANK DAVID
分类号	F04B9/10	主分类号	F04B9/10
代理机构		代理人
主权项
地址

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