航空微波测距仪是测定二等补充网的有效仪器, 但不能用于一等控制网测量.Aerodist is a useful equipment for secondary breakdown , but not for primary control.半导体激光测距仪主要由激光发射光源 、 接收系统和光学天线组成.Laser rangefinder consists of laser emission source, receiving syste...

“测距仪”的英语可以翻译为：ange finder ...