Improvements in mining machines of the kind adapted to travel along the floor of a mine,申请号GB19490022716-传众专利搜索

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发明名称	Improvements in mining machines of the kind adapted to travel along the floor of a mine
摘要
申请公布号	GB655717(A)	申请公布日期	1951.08.01
申请号	GB19490022716	申请日期	1947.08.08
申请人	JOY MANUFACTURING COMPANY	发明人
分类号	E21C35/00	主分类号	E21C35/00
代理机构		代理人
主权项
地址

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