... machine mainly use for hotel, factory,medical industry and so on 2, portable one 3, CE and ROHS approved 20g portable ozone machine for hotel ... other advantages of mobile disinfection3 ozone quartz glass tube cavity for the removal of ozone at high concentrations, a more ... air-source and oxygen source one machine, the customer can use on demand Useful: 1, the laboratory: materials, oxidation, fading, ...