Устройство для вращательного колонкового бурения,申请号SU19290061447-传众专利搜索

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发明名称	Устройство для вращательного колонкового бурения
摘要
申请公布号	SU43582(A1)	申请公布日期	1935.06.30
申请号	SU19290061447	申请日期	1929.12.31
申请人	LAKS R.I.	发明人	LAKS R.I.
分类号	E21B25/00;E21B4/02	主分类号	E21B25/00
代理机构		代理人
主权项
地址

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