Improvements relating to coal, mineral and rock-cutting tool-arms, for use in combination with electric, compressed-air and like power-motors,申请号GB19290017647-传众专利搜索

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发明名称	Improvements relating to coal, mineral and rock-cutting tool-arms, for use in combination with electric, compressed-air and like power-motors
摘要
申请公布号	GB331355(A)	申请公布日期	1930.07.03
申请号	GB19290017647	申请日期	1929.06.08
申请人	GEORGE TUCKER JONES;WILLIAM KEMP	发明人
分类号	E21C25/30	主分类号	E21C25/30
代理机构		代理人
主权项
地址

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