METHOD AND APPARATUS FOR ROTARY DRILLING,申请号GB19880028808-传众专利搜索

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发明名称	METHOD AND APPARATUS FOR ROTARY DRILLING
摘要
申请公布号	GB2213853(A)	申请公布日期	1989.08.23
申请号	GB19880028808	申请日期	1988.12.09
申请人	* OY TAMPELLA AB	发明人	PEKKA * SALMI
分类号	E21B19/08;E21B3/02;E21B19/086	主分类号	E21B19/08
代理机构		代理人
主权项
地址

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