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Fresh water resource is very important for human beings.However, water waste is very serious especially in our daily life.When we are picking up the water, not close the tap in time, resulting in a lot of water is wasted.Saving water is specially designed to save water.It is through the knob to control the flow of water.Dial a circle represents a litre.Blue scale as a starting point and end point.As long as you put the knob back to the origin, you can turn off the tap at any time.
South China University of Technolog
panyu district,Guang zhou city, China
university of south china