Mine roof support,申请号GB19790015735-传众专利搜索

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发明名称	Mine roof support
摘要
申请公布号	GB2048352(A)	申请公布日期	1980.12.10
申请号	GB19790015735	申请日期	1979.05.05
申请人	DOWTY MINING EQUIPMENT LTD	发明人
分类号	E21D23/03;(IPC1-7):E21D19/00	主分类号	E21D23/03
代理机构		代理人
主权项
地址

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