A method of boring holes,申请号GB19810017317-传众专利搜索

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发明名称	A method of boring holes
摘要
申请公布号	GB2099884(A)	申请公布日期	1982.12.15
申请号	GB19810017317	申请日期	1981.06.05
申请人	DRILL AID (METHODS & MATERIALS) LTD	发明人
分类号	C09K8/38;E21B21/06;E21B21/14;(IPC1-7):E21B21/00	主分类号	C09K8/38
代理机构		代理人
主权项
地址

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