CLOSED FLEXIBLE GANGWAY LINING,ESPECIALLY FOR UNTERGROUND MINE GANGWAYS,申请号PL19780204166-传众专利搜索

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发明名称	CLOSED FLEXIBLE GANGWAY LINING,ESPECIALLY FOR UNTERGROUND MINE GANGWAYS
摘要
申请公布号	PL113581(B1)	申请公布日期	1980.12.31
申请号	PL19780204166	申请日期	1978.01.23
申请人		发明人
分类号	E21D11/20;E21D11/22;(IPC1-7):E21D11/20	主分类号	E21D11/20
代理机构		代理人
主权项
地址

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