Improvements in drilling and boring apparatus,申请号GB19430009533-传众专利搜索

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发明名称	Improvements in drilling and boring apparatus
摘要
申请公布号	GB564234(A)	申请公布日期	1944.09.19
申请号	GB19430009533	申请日期	1943.06.15
申请人	JOHN REGINALD JONES	发明人
分类号	E21B21/01	主分类号	E21B21/01
代理机构		代理人
主权项
地址

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