MINE ROOF SUPPORTS,申请号GB19720049649-传众专利搜索

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发明名称	MINE ROOF SUPPORTS
摘要
申请公布号	GB1412984(A)	申请公布日期	1975.11.05
申请号	GB19720049649	申请日期	1972.10.27
申请人	COAL INDUSTRY PATENTS LTD	发明人
分类号	E21D11/24;(IPC1-7):E21D11/24	主分类号	E21D11/24
代理机构		代理人
主权项
地址

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