Valve used as a control,申请号US19500198511-传众专利搜索

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发明名称	Valve used as a control
摘要
申请公布号	US2687841(A)	申请公布日期	1954.08.31
申请号	US19500198511	申请日期	1950.12.01
申请人	NELLIE CHURCHMAN	发明人
分类号	F04B49/035;F16T1/00;F16T1/14	主分类号	F04B49/035
代理机构		代理人
主权项
地址

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