MINE WORKING EXTRACTION FAN DIFFUSER,申请号PL19880273042-传众专利搜索

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发明名称	MINE WORKING EXTRACTION FAN DIFFUSER
摘要
申请公布号	PL273042(A1)	申请公布日期	1989.12.27
申请号	PL19880273042	申请日期	1988.06.13
申请人	POLITECHNIKA SLASKA IM WINCENT	发明人	DRENDA JAN
分类号	E21F;E21F1/08;F04D;(IPC1-7):E21F/;F04D/	主分类号	E21F
代理机构		代理人
主权项
地址

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