OZONIA (Suez), Wedeco (Xylem), Mitsubishi Electric, Toshiba, Primozone, Metawater, Ozono Elettronica Internazionale, MKS, Oxyzone, DEL, ESCO lnternational, Qingdao Guolin Industry, Newland EnTech, Koner, Taixing Gaoxin, Jiuzhoulong, Tonglin Technology, Hengdong, Sankang Envi-tech, Nippon Photoelectricity Equipment