Improvements in or relating to coal cutting machines,申请号GB19290009399-传众专利搜索

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发明名称	Improvements in or relating to coal cutting machines
摘要
申请公布号	GB329089(A)	申请公布日期	1930.05.15
申请号	GB19290009399	申请日期	1929.03.23
申请人	JOSEPH EDGAR BROWN	发明人
分类号	E21C35/193	主分类号	E21C35/193
代理机构		代理人
主权项
地址

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