open bevel型钢: fashioned iron; figured iron ...的: 4次方是 The fourth power of 2 i ...翼缘(指型钢的缘): wing成形机, 冷弯机, (型钢的)粗轧机: shaping mill结构型钢的几何性质: appendix b geometric properties of structural shapes下载手机词典可随时随地查词查翻译