Well pumping apparatus,申请号US19290414560-传众专利搜索

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发明名称	Well pumping apparatus
摘要
申请公布号	US1842686(A)	申请公布日期	1932.01.26
申请号	US19290414560	申请日期	1929.12.16
申请人	ROLAND PLOTTS	发明人	PLOTTS ROLAND
分类号	F04B47/02	主分类号	F04B47/02
代理机构		代理人
主权项
地址

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