Well pumping apparatus of the free piston type,申请号US19580735636-传众专利搜索

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发明名称	Well pumping apparatus of the free piston type
摘要
申请公布号	US2970547(A)	申请公布日期	1961.02.07
申请号	US19580735636	申请日期	1958.05.15
申请人	MCMURRY EVERETT D	发明人	MCMURRY EVERETT D.
分类号	F04B47/12	主分类号	F04B47/12
代理机构		代理人
主权项
地址

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