FIELD: water supply and drainage for equipment of water wells. SUBSTANCE: gravel deflectors are L-shaped. They are placed in pairs in opposition with clearances between ends. These clearances form slits equal to height of holes between deflectors and to average diameter of gravel of sprinkling outline. Vertical side holes under deflectors and horizontal slits form filtering surface of well filter. EFFECT: increased porosity of well filter. 2 dwg
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Authors
Dates
2001-04-27—Published
1998-11-30—Filed