Improvements in mining machines,申请号GB19490002968-传众专利搜索

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发明名称	Improvements in mining machines
摘要
申请公布号	GB674058(A)	申请公布日期	1952.06.18
申请号	GB19490002968	申请日期	1949.02.03
申请人	MAVOR & COULSON LIMITED;JOHN CONNEL SPROUL	发明人
分类号	E21C35/10	主分类号	E21C35/10
代理机构		代理人
主权项
地址

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