Improvements in or relating to mine roof supports,申请号GB19630031435-传众专利搜索

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发明名称	Improvements in or relating to mine roof supports
摘要
申请公布号	GB1044907(A)	申请公布日期	1966.10.05
申请号	GB19630031435	申请日期	1963.08.08
申请人	ELECTRO-HYDRAULICS LIMITED	发明人	LEE ROGER DEMANT
分类号	E21D23/00;E21D23/04	主分类号	E21D23/00
代理机构		代理人
主权项
地址

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