Improvements in or relating to props for mines,申请号GB19360026544-传众专利搜索

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发明名称	Improvements in or relating to props for mines
摘要
申请公布号	GB482516(A)	申请公布日期	1938.03.30
申请号	GB19360026544	申请日期	1936.09.30
申请人	MARTIN JOHN CONWAY	发明人
分类号	E21D15/54	主分类号	E21D15/54
代理机构		代理人
主权项
地址

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