construction steelfabricated steelframing steelmsstructural ironstructural steelstructure iron船体结构钢: hull-structural steel低锰结构钢: ducol steel低碳结构钢: structural low carbon steel飞机结构钢: aircraft structural steel高强结构钢: high strength co truction steel; high strength construction steel下载手机词典可随时随地查词查翻译