... industry and so on 2, portable one 3, CE and ROHS approved 20g portable ozone machine for hotel with CEFeature:1 Outer case ... thorough disinfection and sterilization, long-life design4 air-source and oxygen source one machine, the customer can use on demand Useful ... on.5, the pharmaceutical industry: production, such as water, central air conditioning systems, shop, locker room, sterile room.6, the ...