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![PDF] BioSand household water filter project in Nepal | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/cac36789a9aa044331b3e857b0d6d3797a90306b/21-Figure2-1.png "PDF] BioSand household water filter project in Nepal | Semantic Scholar")
PDF] BioSand household water filter project in Nepal | Semantic Scholar
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