短語詞組短語Vertical Drop Line 垂線圖hook vertical stroke line 吊鉤垂直線vertical dashed line 垂直破線vertical retrace line [電子]垂直回描線;場(chǎng)逆程線vertical main line system 垂直干線子系統(tǒng)vertical drainage line 豎向排水體vertical -line method 垂線法vertical center line illusion 垂直中線錯(cuò)覺 返回 vertical line