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eople judge the size of the tap water flow are kinds of visual, emotional judgments.Because of this，the flow of water is always bigger than we need.
We make resistance through the raised surface on the faucet,to turn the visual sensation into tactual sensation , emotional judgement into rational judgement. the flow of water is divided into six files through four raised surface on the switch .
In this way, people can get an accurately distinguish on the flow of water. While a relatively small range of options to achieve the purpose of saving water. At the same time, even in the case of invisible ,users can also meet their own needs.
Peiming Li,Yuxiang Wu,Jiaojiao Liu