Improvements in or relating to coal cutting machines and the like for the laying of dust and suppression of flame, and dissipation of gas,申请号GB19390012924-传众专利搜索

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发明名称	Improvements in or relating to coal cutting machines and the like for the laying of dust and suppression of flame, and dissipation of gas
摘要
申请公布号	GB528968(A)	申请公布日期	1940.11.12
申请号	GB19390012924	申请日期	1939.05.01
申请人	JOHN CLAMP WALKER;WILLIAM RALPH EVANS;JOHN SHELTON IRON;STEEL & COAL COMPANY, LIMITED	发明人
分类号	E21C35/22	主分类号	E21C35/22
代理机构		代理人
主权项
地址

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