... , portable one 3, CE and ROHS approved 20g portable ozone machine for hotel with CEFeature:1 Outer case is made of the ... sterilization, long-life design4 air-source and oxygen source one machine, the customer can use on demand Useful: 1, the laboratory ... food processing industry: such as the production of water, production workshop, sterile room, equipment, tools and so on.5, the pharmaceutical ...