A device for drilling holes in the crust of the earth, especially for drilling oil wells,申请号GB19950012069-传众专利搜索

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发明名称	A device for drilling holes in the crust of the earth, especially for drilling oil wells
摘要
申请公布号	GB9512069(D0)	申请公布日期	1995.09.06
申请号	GB19950012069	申请日期	1993.12.13
申请人	ROGALANDSFORSKNING	发明人
分类号	E21B4/00;E21B21/00;E21B23/08	主分类号	E21B4/00
代理机构		代理人
主权项
地址

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