Improvements in and relating to pull-wire signalling systems for use in mines, quarries and the like,申请号GB19580013491-传众专利搜索

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发明名称	Improvements in and relating to pull-wire signalling systems for use in mines, quarries and the like
摘要
申请公布号	GB880866(A)	申请公布日期	1961.10.25
申请号	GB19580013491	申请日期	1958.04.29
申请人	JOHN DAVIS AND SON (DERBY) LIMITED;WILFRED BRUCE DAVIS	发明人
分类号	B66B7/06;B66B19/06	主分类号	B66B7/06
代理机构		代理人
主权项
地址

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