11 Water treatment apparatus, namely, clarification and thickening machines for use in treatment of liquids in the nature of water, waste water and industrial water; water treatment and liquid concentration systems comprised primarily of one or more of the following pieces of equipment, namely, membrane filtration modules for filtering water, clarifiers, evaporators, humidifiers, condensers, dehumidifiers; water treatment apparatus, namely, oxidation and disinfection machines for use in treatment of liquids in the nature of water, waste water and industrial water; water treatment and oxidation systems comprised primarily of one or more of the following pieces of equipment, namely, reactors, bubble diffusers, electrodes, voltage control systems; water treatment and desalination equipment, namely, water filtration units, membrane desalination units, and reverse osmosis units