TY - CPAPER AU - Conf.dr.ing. Nitoi Dan Florin AU - Amza Gheorghe AU - Semenescu Augustin AU - Conf.dr.ing. Chivu Oana Roxana AU - Sef lucr.dr.ing. Amza Zoia TI - RESEARCHES ON AIR PURIFICATION USING ULTRASONIC FILTERS T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies PY - 2017 SP - 483 EP - 490 DO - 10.5593/sgem2017h/43/s19.061 PB - STEF92 Technology ER -