Device to facilitate the speedy changing of hutches at landings of balance inclines used in mines,申请号GB19340024510-传众专利搜索

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发明名称	Device to facilitate the speedy changing of hutches at landings of balance inclines used in mines
摘要
申请公布号	GB443720(A)	申请公布日期	1936.02.25
申请号	GB19340024510	申请日期	1934.08.25
申请人	PATRICK LAFFERTY	发明人
分类号	E21F13/02	主分类号	E21F13/02
代理机构		代理人
主权项
地址

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