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In ancient times we use flow kinetic energy to push the mill grinding flour, now we no longer live along the river. Water,however, is being wasted imperceptibly when we use tap flow kinetic energy. "The water wheel" that utilizes water as power, is a new kind of grinding machine, which will make it easy and interesting to grind pepper. Put on a tap, the propeller inside will grind pepper when we use water normally such as collecting water，dish washing.
Dalian Minzu University