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A new type of stone sand making machine creates a green sand making production line

A new type of stone sand making machine creates a green sand making production line

Feb 02, 2020 Mar 21, 2012 Slow sand filter system in Haiti (Pure Water for the World) The average slow sand filter’s construction cost ranges from US $15-$60, depending on whether local or imported materials are used. Filter programs are either fully subsidized or operated at partial cost recovery (with users paying $2-$10) using donor funds.

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