Improvements relating to mine roof support and conveyor means,申请号GB19630017902-传众专利搜索

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发明名称	Improvements relating to mine roof support and conveyor means
摘要
申请公布号	GB1004630(A)	申请公布日期	1965.09.15
申请号	GB19630017902	申请日期	1963.05.07
申请人	W. E. & F. DOBSON LIMITED	发明人	COWLISHAW FRANK
分类号	E21D23/00;E21F13/08	主分类号	E21D23/00
代理机构		代理人
主权项
地址

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