The APU fuel system consist of a fuel valve, control unit, solenoid valve, filter, heater and control valve.
APU燃油系统包括一个燃油活门、控制组件、电磁活门油滤、加热器及控制活门。
It comprises of four basic unit: input delay, filter, register bank, and control unit.
这种结构由四部分构成：输入延迟单元、寄存器单元、滤波器单元和控制单元。
The analog filter is the important unit of modern measurement and control system, but the traditional method has a very tedious design process.
模拟滤波器是现代测控系统中的重要部件，传统设计方法的设计过程繁琐。
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