The cylinder itself contains a small digital camera, a radio transmitter, an induction-powered charging device to provide electricity and an "orientation actuator".
圆柱体本身含有一个微型数码摄像头，一个无线电发射器，一个感应动力的发电装置，以及一个方位驱动器。
2
The stepping motor is a precision electromechanical incremental actuator. It widely USES the digital approach for control of industrial machines.
步进电机是一种进行精确步进运动的机电执行元件，它广泛地用于工业机械的数字控制。
3
A digital protection platform is designed according to IEC 61850, in which the merging unit, smart actuator and bay-level devices are mapped to actual circuit boards.