horizontal guy水平拉线horizontaladj.水平的；横的n.水平线；水平面horizontal-frequency regulator行频调节器horizontal volute propeller pump卧式蜗壳旋桨泵horizontalblanking multivibrator水平消隐多谐振荡器, 行消隐多谐振荡器horizontal uni direction airflow水平净化horizontal system of coordinates地平坐标系Horizontal Dipole with Reflector有反射器的水平偶极天线horizontal fissure of cerebellum小脑水平沟horizontal transform coefficient横向变形系数horizontal-axial-road header横轴式掘进机horizontal stiffness coefficient水平刚度系数

1. The vertical line meets the horizontal one here.
   垂直线与水平线在此相交。
2. The exception to this rule is that lines viewed in parallel or perpendicular to the viewer will not converge.
   这时候朝向或者背离观察者的线在水平线上只有一个灭点。