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A self-contained filter designed for filtration of water resources.It was inspired by the steamer in Chinese cooking, Therefore, only certain weaving techniques are required to make the large structure of the design, and the fillers can be made from local materials. For example, small gravel is layered from top to bottom, and sand, charcoal and cotton can be filtered and purified to make drinking water. Layered filling of sand, charcoal, cotton can filter out livestock drinking water; And with gravel, sand, cotton can filter out daily farming, clean water.Better to teach a man to fish than to teach him to fish.