包邮土木工程专业英语

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《土木工程专业英语》：高等学校专业英语系列教材。

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插图：kyscrapers.or as an extemal surface covering.There m many types Of metals used for building.Steel is a metal alloy whose major compo nent is iron.and is the usual choice for metal structural building ma-terials.It is strong.flexible，and if refined well and／or treated lasts along time.Corrosion is metal prime enemy when it comes to longevity.The lower density and better corrosion resistance of aluminum al·10vs and tin sometimes overcome their greater cost.Brass wa8 morecommon in the past，but is usually restricted to specific uses or spe。ciahy items today.