Improvements in telescopic pit props,申请号GB19570002501-传众专利搜索

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发明名称	Improvements in telescopic pit props
摘要
申请公布号	GB843954(A)	申请公布日期	1960.08.10
申请号	GB19570002501	申请日期	1957.01.23
申请人	DOWTY MINING EQUIPMENT LIMITED	发明人	MILLS JOSEPH ALEXANDER WALLACE
分类号	E21D15/44;E21D15/52;E21D15/59	主分类号	E21D15/44
代理机构		代理人
主权项
地址

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