Improvements in or relating to method of and means for lining or walling hollow spaces in the earth, such as workings, shafts, tunnels, more particularly in connection with mining,申请号GB19330002444-传众专利搜索

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发明名称	Improvements in or relating to method of and means for lining or walling hollow spaces in the earth, such as workings, shafts, tunnels, more particularly in connection with mining
摘要
申请公布号	GB415449(A)	申请公布日期	1934.08.27
申请号	GB19330002444	申请日期	1933.01.25
申请人	PAUL HOFFMANN	发明人
分类号	E21D5/08;E21D11/15	主分类号	E21D5/08
代理机构		代理人
主权项
地址

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