They are aimed at either cleaning the water in the primary system, providing separate shutdown cooling functions, water chemistry, charging and volume control, makeup water.
它们的目标是清理主系统的水,提供分离的停止,冷却的功能,水化学,装料及容量控制,补充水。
With full control of volume levels handed to the system, the computer could automatically lower the din on one channel and allow the speech to come through as a pleasant relief.
只要将音量水平的控制权交给系统,计算机就可以自动降低一个声道的声音,让语音发出悦耳的声音。
Control valve in an air system for setting volume and pressure.
为了保持流量和压力的空气系统的控制阀门。
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