METHOD AND APPARATUS FOR FORMING HOLES,申请号GB19790004811-传众专利搜索

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发明名称	METHOD AND APPARATUS FOR FORMING HOLES
摘要
申请公布号	GB2014217(B)	申请公布日期	1982.05.12
申请号	GB19790004811	申请日期	1979.02.12
申请人	INTRUSION PREPAKT INC	发明人
分类号	E21B4/16;E21B4/20;E21B7/00;E21B7/20;E21B7/26;E21B7/30;E21B10/32;(IPC1-7):E21D1/03	主分类号	E21B4/16
代理机构		代理人
主权项
地址

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