tangent offset methods的意思|示意

This paper introduces the theory and its application of the curvilinear guided survey methods in concealed excavation of tunnels, such as chord offset method and tangent offset method.

介绍暗挖隧道曲线导向测量方法——弦线支距法和切弦线支距法的原理及应用。

There are many methods to measure the circular curved line in circuitry construction survey. Angle offset method and tangent offset method are usually used.

在线路施工测量中，圆曲线测设方法有很多，通常采用偏角法或切线支距法。