Modern Bridges(10.现代桥梁)

Twonineteenth-centuryinventionsledtoarevolutioninbridgebuilding.ThesewerePartlandcementandmass-producedsteel.Cementisthevitalingredientofconcrete,andmassconcretecanbeusedtobuildpiers,abutments(banksupports),andarchesof“artificial”stonetoanyrequiredshape.Well-madeconcreteisextremelystrongincompres ......(共5574字)[阅读本文]>>

更多同类【建筑施工英语】......
科普知识