SHAFT DEWATERING EQUIPMENT,申请号PL19770199864-传众专利搜索

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发明名称	SHAFT DEWATERING EQUIPMENT
摘要
申请公布号	PL112052(B1)	申请公布日期	1980.09.30
申请号	PL19770199864	申请日期	1977.07.25
申请人		发明人
分类号	E21F;E21F16/00;F04D15/00;(IPC1-7):E21F16/00	主分类号	E21F
代理机构		代理人
主权项
地址

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