双交叉限位控制系统是实现燃烧炉控制的一种新型控制方法，一改以往静态“空燃比限位”的控制方式，实现动态比率限位控制。
Limit control system of expanding double-cross is a new control method, it changes control mode from former static state to dynamic one in controlling limit rate air to fuel.
饮用水管道中的流量计向控制系统传送信息，控制系统控制泵的速度以控制比率。
A flow meter in the potable water line feeds information to the control system which controls the pump speed to control ratio.
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