Фильтр (стрейнер) для буровых скважин,申请号SU19380020788-传众专利搜索

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发明名称	Фильтр (стрейнер) для буровых скважин
摘要
申请公布号	SU58805(A1)	申请公布日期	1940.11.30
申请号	SU19380020788	申请日期	1938.12.29
申请人	LOPUKHOVSKIJ S.YA.;RAYUK N.E.	发明人	LOPUKHOVSKIJ S.YA.;RAYUK N.E.
分类号	E21B43/08;E03B3/18	主分类号	E21B43/08
代理机构		代理人
主权项
地址

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