LINING FOR MINE EXCAVATIONS ESPECIALLY FOR GANGWAYS ANDTUNNELS,申请号PL19770198086-传众专利搜索

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发明名称	LINING FOR MINE EXCAVATIONS ESPECIALLY FOR GANGWAYS ANDTUNNELS
摘要
申请公布号	PL111694(B1)	申请公布日期	1980.09.30
申请号	PL19770198086	申请日期	1977.05.13
申请人		发明人
分类号	E21D11/20;E21D11/22;(IPC1-7):21D11/22	主分类号	E21D11/20
代理机构		代理人
主权项
地址

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