Improvements in mining machines,申请号GB19290007856-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	GB308213(A)	申请公布日期	1930.08.11
申请号	GB19290007856	申请日期	1929.03.11
申请人	SULLIVAN MACHINERY COMPANY	发明人
分类号	E21C29/10	主分类号	E21C29/10
代理机构		代理人
主权项
地址

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