IMPROVEMENTS IN OR RELATING TO ADVANCING MINE ROOF SUPPORTS,申请号GB19700030793-传众专利搜索

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发明名称	IMPROVEMENTS IN OR RELATING TO ADVANCING MINE ROOF SUPPORTS
摘要
申请公布号	GB1269022(A)	申请公布日期	1972.03.29
申请号	GB19700030793	申请日期	1970.06.25
申请人	GULLICK DOBSON LIMITED	发明人
分类号	E21D23/08	主分类号	E21D23/08
代理机构		代理人
主权项
地址

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