1,20g ozone machine mainly use for hotel, factory,medical industry and so on 2, portable one 3, CE and ROHS approved 20g ... air-source and oxygen source one machine, the customer can use on demand Useful: 1, the laboratory: materials, oxidation, fading, and ... of water, production workshop, sterile room, equipment, tools and so on.5, the pharmaceutical industry: production, such as water, central air ...