Control systems for mine roof supports,申请号GB19640043344-传众专利搜索

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发明名称	Control systems for mine roof supports
摘要
申请公布号	GB1117411(A)	申请公布日期	1968.06.19
申请号	GB19640043344	申请日期	1964.10.23
申请人	COAL INDUSTRY (PATENTS) LIMITED	发明人	MARTIN DAVID JAMES REGINALD
分类号	E21D23/14;E21D23/20	主分类号	E21D23/14
代理机构		代理人
主权项
地址

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