Improvements in or relating to hydraulic mine roof supports,申请号GB19610035978-传众专利搜索

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发明名称	Improvements in or relating to hydraulic mine roof supports
摘要
申请公布号	GB993562(A)	申请公布日期	1965.05.26
申请号	GB19610035978	申请日期	1961.10.06
申请人	A. G. WILD & CO. LIMITED	发明人	ROOK JACK
分类号	E21D15/44	主分类号	E21D15/44
代理机构		代理人
主权项
地址

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