Improvements in or relating to the staying of arched ribs in the supporting structure of underground roadways and tunnels,申请号GB19560016170-传众专利搜索

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发明名称	Improvements in or relating to the staying of arched ribs in the supporting structure of underground roadways and tunnels
摘要
申请公布号	GB799889(A)	申请公布日期	1958.08.13
申请号	GB19560016170	申请日期	1956.05.24
申请人	BERGBAUSTAHL G.M.B.H.	发明人
分类号	E21D11/28	主分类号	E21D11/28
代理机构		代理人
主权项
地址

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