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It is a pontoon design of drainage holes, mainly to solve the hair plug the drain plug hole and remove the hair. The principle of the use of floats, when the hair from blocking drainage, the accumulation of water will float rises, while the hair with a rose, the water can be discharged. Users will pick up the buoy, to seize the middle of the object will float down move, you can remove the hair.
National Cheng Kung University
Tainan City, Taiwan