短語詞組短語perpendicular grid line 垂直網(wǎng)線perpendicular vertical line 垂直線common perpendicular line 廣義wind velocity perpendicular line 風(fēng)速垂線Perpendicular to ground line 垂直地麪線perpendicular line segment 垂線段test for perpendicular line [數(shù)]垂直線騐証法perpendicular line calculated method 垂線計(jì)算法a perpendicular line 垂直線 返回 perpendicular line