[REMOVAL OF IMPURITIES BY RECIRCULATION OF WATER IN SWIMMING POOLS].
D012498:Sanitary Engineering; D013551:Swimming Pools; D014867:Water; D014871:Water Microbiology; D014876:Water Pollution
D014867:Water
SANITARY ENGINEERING; SWIMMING POOLS; WATER MICROBIOLOGY; WATER POLLUTION
LA RIMOZIONE DELLE IMPURIT'A PER EFFETTO DELLA RICIRCOLAZIONE DELL'ACQUA NELLE PISCINE.