An improved method of and apparatus for increasing the cooling effect and economic efficiency of compressed air in mining,申请号GB19520009285-传众专利搜索

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发明名称	An improved method of and apparatus for increasing the cooling effect and economic efficiency of compressed air in mining
摘要
申请公布号	GB707031(A)	申请公布日期	1954.04.07
申请号	GB19520009285	申请日期	1952.04.10
申请人	GUTEHOFFNUNGSHUETTE OBERHAUSEN AKTIENGESELLSCHAFT	发明人
分类号	E21F3/00	主分类号	E21F3/00
代理机构		代理人
主权项
地址

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