Improvements in or relating to pit props,申请号GB19600000080-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	GB884264(A)	申请公布日期	1961.12.13
申请号	GB19600000080	申请日期	1960.01.01
申请人	ALEXANDER SCHMIDT	发明人
分类号	E21D15/502	主分类号	E21D15/502
代理机构		代理人
主权项
地址

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