FIELD: additional cleaning of water fed from centralized water source. SUBSTANCE: apparatus includes housing with filtering layers arranged in it. At least one filtering layer is made of fibrous non-woven material in the form of strip twisted to helix. Fibres of non-woven material are oriented mainly along water flowing direction. EFFECT: high quality of water cleaning with stable efficiency. 3 cl, 2 dwg
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Authors
Dates
1999-05-27—Published
1998-05-21—Filed