地面速度 meaning in English

ground speed

The frequencies of the returned beams are compared with them to obtain the true ground speed .
将它们与反回射束作对比而获得真实的地面速度。
Earth - moving machinery - determination of ground speed
土方机械.地面速度的测定
Method for determination of ground speed of earth - moving machinery
运土机械地面速度的测定方法
The velocity field distribution will vary in the different location of the diffuser
置换通风中送风口的位置对地面速度场分布的影响