alloy constructional steelalloy structural steelalloy structureal steelco tructional alloy steelconstructional alloy steelstructural alloy steel合金: alloy结构钢: structural steel合金结构钢丝: alloy structural steel wire高级合金结构钢: high-grade alloy structure steel普通低合金结构钢: common low alloy structural steel; general structure low-alloy steel下载手机词典可随时随地查词查翻译