COAL DEPOSIT STOPPING,申请号PL19860262990-传众专利搜索

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发明名称	COAL DEPOSIT STOPPING
摘要
申请公布号	PL262990(A1)	申请公布日期	1988.09.01
申请号	PL19860262990	申请日期	1986.12.12
申请人		发明人
分类号	E21F;E21F5/18;E21F7/00;(IPC1-7):E21F/	主分类号	E21F
代理机构		代理人
主权项
地址

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