ELLIPTIC CLOSED-SET MINE LINING OF LIMITED YELDABILITY,申请号PL19870266854-传众专利搜索

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发明名称	ELLIPTIC CLOSED-SET MINE LINING OF LIMITED YELDABILITY
摘要
申请公布号	PL147706(B1)	申请公布日期	1989.07.31
申请号	PL19870266854	申请日期	1987.07.15
申请人		发明人
分类号	E21D;E21D11/14;(IPC1-7):E21D11/14	主分类号	E21D
代理机构		代理人
主权项
地址

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