IMPROVEMENTS IN DRILLING EQUIPMENT,申请号GB19690047979-传众专利搜索

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发明名称	IMPROVEMENTS IN DRILLING EQUIPMENT
摘要
申请公布号	GB1221607(A)	申请公布日期	1971.02.03
申请号	GB19690047979	申请日期	1969.09.30
申请人	ATLAS COPCO AKTIEBOLAG	发明人
分类号	E21B7/20;E21B10/66	主分类号	E21B7/20
代理机构		代理人
主权项
地址

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