Improvements in and relating to arched supports for mine galleries,申请号GB19500031128-传众专利搜索

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发明名称	Improvements in and relating to arched supports for mine galleries
摘要
申请公布号	GB719458(A)	申请公布日期	1954.12.01
申请号	GB19500031128	申请日期	1950.12.21
申请人	FRIEDRICH WILHELM MOLL	发明人
分类号	E21D11/24	主分类号	E21D11/24
代理机构		代理人
主权项
地址

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