Appearance without damage (with the exception of RF antennaposition openings), and after the shell without obvious scratch and damage;
外观无破损（RF天线部位开孔除外），后壳没有明显划伤和破损；
2
The system adopts 80C31 MCU as the main controller, hybrid Rare-Earth permanent magnet stepper motor as the execution component, bio-passage rotary transformer as antennaposition sensor.
Tofind a target and determine its position, any radar station has to basically consist of a transmitter, a receiver, an antenna, an antenna duplexer, a display and a timer.