Improvements in and relating to rotary deep boring devices,申请号GB19350007083-传众专利搜索

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发明名称	Improvements in and relating to rotary deep boring devices
摘要
申请公布号	GB454848(A)	申请公布日期	1936.10.06
申请号	GB19350007083	申请日期	1935.03.06
申请人	FRIEDRICH MUELLER	发明人
分类号	E21B3/04	主分类号	E21B3/04
代理机构		代理人
主权项
地址

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