Improvements in or relating to mine roof supports of the hydraulic type,申请号GB19610038891-传众专利搜索

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发明名称	Improvements in or relating to mine roof supports of the hydraulic type
摘要
申请公布号	GB968553(A)	申请公布日期	1964.09.02
申请号	GB19610038891	申请日期	1961.10.31
申请人	A. G. WILD & CO. LIMITED	发明人	ROOK JACK
分类号	E21D15/58;E21D23/00	主分类号	E21D15/58
代理机构		代理人
主权项
地址

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