Balanced flow valve,申请号US19530372989-传众专利搜索

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发明名称	Balanced flow valve
摘要
申请公布号	US2797700(A)	申请公布日期	1957.07.02
申请号	US19530372989	申请日期	1953.08.07
申请人	CAMCO, INCORPORATED	发明人	JR. HAROLD E. MCGOWEN,
分类号	E21B43/12;F16K41/10	主分类号	E21B43/12
代理机构		代理人
主权项
地址

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