低空无线电高度表，一种测量飞机至地形的垂直距离的系统。

LOW RANGE RADIO ALTIMETER, a system that measures the vertical distance from the airplane to the terrain.

youdao

低空无线电高度表，一种测量飞机至地形的垂直距离的系统。

LOW RANGE RADIO ALTIMETER, a system that measures the vertical distance from the airplane to the terrain.

youdao