竖曲线

shè jì gōng lù zòng duàn miàn shù qū xiàn cǎi yòng zhí xiàn nǐ hé shù qū xiàn de fāng fǎ

设计公路纵断面竖曲线，采用直线拟合竖曲线的方法。

In designing of vertical curve of highway, straight lines are usually used to approximate the vertical curve.