METHOD AND APPARATUS FOR FORMING HOLES,申请号GB19710013155-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	GB1322275(A)	申请公布日期	1973.07.04
申请号	GB19710013155	申请日期	1971.05.05
申请人	LEHMANN O	发明人
分类号	B66C13/00;E02F3/413;E02F3/47;(IPC1-7):E21B19/08;E21B11/04	主分类号	B66C13/00
代理机构		代理人
主权项
地址

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