... ,medical industry and so on 2, portable one 3, CE and ROHS approved 20g portable ozone machine for hotel with CEFeature:1 Outer ... industry: If the vegetable storage, preservation, processing and production of water and so on.4, the food processing industry: such ... room, sterile room.6, the medical industry: such as hospital wards, operating theaters, medical equipment, sterile room Also we can ...