CONNECTION DEVICE FOR STRING OF DRILL PIPES FOR ROTARY PERCUSSION DRILLING, ESPECIALLY FOR SIMULTANEOUS DRILLING,申请号KR20017004213-传众专利搜索

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发明名称	CONNECTION DEVICE FOR STRING OF DRILL PIPES FOR ROTARY PERCUSSION DRILLING, ESPECIALLY FOR SIMULTANEOUS DRILLING
摘要
申请公布号	KR100556271(B1)	申请公布日期	2006.03.03
申请号	KR20017004213	申请日期	2001.04.02
申请人		发明人
分类号	E21B17/04	主分类号	E21B17/04
代理机构		代理人
主权项
地址

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