HORIZONTAL RING TYPE ROTARY DRILL SYSTEM AND METHOD USING THE SAME,申请号KR20080050791-传众专利搜索

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发明名称	HORIZONTAL RING TYPE ROTARY DRILL SYSTEM AND METHOD USING THE SAME
摘要
申请公布号	KR100977212(B1)	申请公布日期	2010.08.20
申请号	KR20080050791	申请日期	2008.05.30
申请人		发明人
分类号	E21B3/00	主分类号	E21B3/00
代理机构		代理人
主权项
地址

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