8.Tunnel Engineering

Tunnelingwasprobablyoneofmansearliestexercisesinthefieldofcivilengineering.TheancientEgyptiansareknowntohavebuilttunnelsfortransportingwaterandforuseastombs.TheEgyptiansalsoundertookminingoperations,cuttingdeeptunnelstoexcavatecopperores.Todaytunnelsareus ......     (本文共 6317 字 )     [阅读本文]>>




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