A new or improved method of and apparatus for producing a roadway in subterranean workings,申请号GB19550001251-传众专利搜索

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发明名称	A new or improved method of and apparatus for producing a roadway in subterranean workings
摘要
申请公布号	GB764350(A)	申请公布日期	1956.12.28
申请号	GB19550001251	申请日期	1955.01.14
申请人	ADELE OELLRICH	发明人
分类号	E21D9/10;E21D9/12	主分类号	E21D9/10
代理机构		代理人
主权项
地址

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