MINE ROOF SUPPORTS AND SPRAGS THEREFOR,申请号GB19880000442-传众专利搜索

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发明名称	MINE ROOF SUPPORTS AND SPRAGS THEREFOR
摘要
申请公布号	GB2214216(B)	申请公布日期	1992.02.05
申请号	GB19880000442	申请日期	1988.01.09
申请人	* GULLICK DOBSON LIMITED	发明人	JOHN HENRY * WATERS
分类号	E21D23/04	主分类号	E21D23/04
代理机构		代理人
主权项
地址

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