control unit

基本解释

The system consists of two air vehicles and a ground control unit.
该系统包含两个飞行器和一个地面控制单元。
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This subsystem normally resides in the printing system's control unit (a single locality).
这个子系统通常存在于打印系统的控制单元中（单个地区）。
The electricity thus generated is sufficient to send an OK signal to the central control unit.
如此，产生的电力足够向控制中心发送一个“没问题”的信号。

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Because the payload is much less massive than the control unit, the centre of rotation is close to the control unit.
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