Коронка для бурения скважины дробью,申请号SU19590621487-传众专利搜索

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发明名称	Коронка для бурения скважины дробью
摘要
申请公布号	SU130444(A1)	申请公布日期	1959.11.30
申请号	SU19590621487	申请日期	1959.03.06
申请人	OSTROUSHKO I.A.	发明人	OSTROUSHKO I.A.
分类号	E21B10/48;E21B7/16	主分类号	E21B10/48
代理机构		代理人
主权项
地址

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