Control valve,申请号US19510253059-传众专利搜索

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发明名称	Control valve
摘要
申请公布号	US2678056(A)	申请公布日期	1954.05.11
申请号	US19510253059	申请日期	1951.10.25
申请人	INGERSOLL-RAND COMPANY	发明人	DITSON J. D.
分类号	E21B19/081	主分类号	E21B19/081
代理机构		代理人
主权项
地址

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