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This flow controller is used as a controller of the amount of shampoo when people are taking a shower or washing hair. In reality, the possible amount of people' usage varies from child to adult. a child often squeezes out too much, and the liquid wouldn't be put back,causing a waste. this kind of flow controller is about using an additional amount controller to fix this matter, reduced the possibility of wasting.
xiamen university oftechnology
XiaMen, China