CORING DRILLING BIT,申请号SU19904896568-传众专利搜索

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发明名称	CORING DRILLING BIT
摘要
申请公布号	RU1796020(C)	申请公布日期	1993.02.15
申请号	SU19904896568	申请日期	1990.12.27
申请人	BARANNIKOV ALEKSEJ F,SU	发明人	BARANNIKOV ALEKSEJ F,SU
分类号	E21B6/04;E21B17/03	主分类号	E21B6/04
代理机构		代理人
主权项
地址

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