短語(yǔ)詞組短語(yǔ)I -shaped cross-section 工字形截麪wide flange I -section 寬翼工字鋼rolled I -section joist 滾軋工字形小鋼梁Universal rolling for I -beam section 萬(wàn)能法軋工字鋼 返回 I-section