... and ROHS approved 20g portable ozone machine for hotel with CEFeature:1 Outer case is made of the corrosion resisting stainless steel ... be sterilized in a variety of target sites and many other advantages of mobile disinfection3 ozone quartz glass tube cavity for the ... air-source and oxygen source one machine, the customer can use on demand Useful: 1, the laboratory: materials, oxidation, fading, and ...