main control level meaning in English

主操纵手柄

The curved floodgate ' s opening measuring system adopts two - level structure , main control level and field level
弧形闸门开度测量系统采用分层分布式两级结构，分为主控级和现地级两层。
The computers to monitor and control the water level belong to the main control level and are used to monitor every floodgate and measure and display the upriver water level
电厂的水情监控系统的计算机为主控级，用于对各闸门的监控和上游水位的测量显示。