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When we are in the hospital hanging water,we may worry about how much time wiii we spend until it is finished.Also,the nurse want to know how much time left then she can change the water
The Countdown Drip is designed to solve it.We make the pulley be 3 parts with different colours---“blue red and white” .We also design a ruling in the water bag with 2colours--”blue and red”,corresponding the colour in the ruling.Red means fast,and blue means slow.So we can control the speed ,and we can estimate the time left to make good use of our time