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This design is for an ordinary pot which can purify dirty water easily, designed especially for developing areas lacking in clean warter, such as Africa. When lacking in clean water, we just pour dirty water into the pot body, then turn around the cover of the pot, place the pot under the sun. So the clean drops distilled from the dirty water will attach to the cover of the pot, go down the surface of pot's cover and flow to the collector, thus we can get the purified water conveniently.
Tao Ye, Huang Yang, Chen Chao, Wang Guanyun