YELDABLE ARCH-TYPE MINE LINING FOR CROSSINGS OF CORRIDOR TYPE AXCAVATIONS,申请号PL19810229405-传众专利搜索

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发明名称	YELDABLE ARCH-TYPE MINE LINING FOR CROSSINGS OF CORRIDOR TYPE AXCAVATIONS
摘要
申请公布号	PL127889(B1)	申请公布日期	1983.12.31
申请号	PL19810229405	申请日期	1981.01.26
申请人		发明人
分类号	E21D;E21D11/22;E21D11/36;(IPC1-7):E21D11/36	主分类号	E21D
代理机构		代理人
主权项
地址

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