Improvements in or relating to pit-props,申请号GB19530003936-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	GB745654(A)	申请公布日期	1956.02.29
申请号	GB19530003936	申请日期	1953.02.12
申请人	ALFRED BUSCHMANN	发明人
分类号	E21D15/28	主分类号	E21D15/28
代理机构		代理人
主权项
地址

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