Oil well pump plunger,申请号US19480035341-传众专利搜索

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发明名称	Oil well pump plunger
摘要
申请公布号	US2539000(A)	申请公布日期	1951.01.23
申请号	US19480035341	申请日期	1948.06.26
申请人	WILLIAMS ROY C	发明人	WILLIAMS ROY C.
分类号	F04B53/14	主分类号	F04B53/14
代理机构		代理人
主权项
地址

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