Эрлифт для обратной промывки скважин,申请号SU19580613510-传众专利搜索

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发明名称	Эрлифт для обратной промывки скважин
摘要
申请公布号	SU121738(A1)	申请公布日期	1959.11.30
申请号	SU19580613510	申请日期	1958.12.07
申请人	NEUDACHIN G.I.	发明人	NEUDACHIN G.I.
分类号	E21B21/14;E21B21/00	主分类号	E21B21/14
代理机构		代理人
主权项
地址

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