Improvements in or relating to pit props,申请号GB19430001199-传众专利搜索

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发明名称	Improvements in or relating to pit props
摘要
申请公布号	GB563036(A)	申请公布日期	1944.07.26
申请号	GB19430001199	申请日期	1943.01.23
申请人	JOHN EADIE	发明人
分类号	E21D15/12	主分类号	E21D15/12
代理机构		代理人
主权项
地址

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