In
chemistry and common usage, a filter is a device (usually a membrane or layer) that is designed to block certain objects or substances while letting others through. Filters are often used to remove harmful substances from
air or
water, for example to remove
air pollution, to make water drinkable, to prepare
coffee. In domestic food and drink preparation where bulk solids are removed from liquids, this is often called a strainer.
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FILTRATO. LIQUIDO FILTRATO. FILTRARE