Improvements relating to power-operated support frames for mine roofs,申请号GB19580024882-传众专利搜索

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发明名称	Improvements relating to power-operated support frames for mine roofs
摘要
申请公布号	GB885910(A)	申请公布日期	1962.01.03
申请号	GB19580024882	申请日期	1958.08.01
申请人	DOWTY MINING EQUIPMENT LIMITED	发明人	JONES CYRIL TREHEARNE
分类号	E21D19/04;E21D23/00	主分类号	E21D19/04
代理机构		代理人
主权项
地址

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