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FILTER (LIQUID)
sa PHOTOCHEMISTRY FILTER
Used disposable paper dust masks can be re-used to filter paints, lacquers, etc. FINE HOMEBUILDING #40 Jun-Jul 1987 pg. 16
Build this motor oil recycler. The oil is filtered through toilet paper rolls and then heated to drive out water and more volatile fluids. Est. cost: $15. MOTHER EARTH NEWS #67 Jan-Feb 1981 pg. 104
Experiments with the new plastic filter materials that have extremely fine pores. SCIENTIFIC AMERICAN Feb 1971 (v.224#2) pg. 118
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