Servo system of the compact disc storage device is the combination of fine machine and computer control, gathering high tech such as laser measure or tracking position and DSP application.

光盘存储设备的伺服系统是精密机械和计算机控制的结合，集合了激光测量及定位跟踪、DSP应用等高新技术。

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This kind of device employs advanced laser scanning measuring technique, which can measure automatically the coal storage in the open coal yard without necessity of shaping coal pile beforehand.

它采用先进的激光扫描测量技术，可以在不对煤堆进行事先整形的情况下自动测量出大型露天煤场的存煤量。

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