Lock-bottom pump,申请号US19270238265-传众专利搜索

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发明名称	Lock-bottom pump
摘要
申请公布号	US1764075(A)	申请公布日期	1930.06.17
申请号	US19270238265	申请日期	1927.12.07
申请人	EMSCO DERRICK & EQUIPMENT COMPANY	发明人	GUNN ROBERT W.;THOMPSON WILLSIE A. S.
分类号	F04B47/00	主分类号	F04B47/00
代理机构		代理人
主权项
地址

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