系统控制部分两个业务模块公用。
The system control part is shared by these two service modules.
在对各种控制系统进行比较之后，选择plc作为控制器，完成了轨道切换系统控制部分的设计。
After comparing all kinds of control systems, the orbit cut system control part design has completed by taking PLC as controller.
美国空军官员已经开始着手gps的下一步骤，上个月美国空军授权雷神公司研发下一代全球定位系统控制部分，又称为ocx。
Air Force officials took the next step in that process when they awarded a contract last month to Raytheon Company for the next Generation GPS Control Segment, commonly referred to as OCX.
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