11 Industrial installations for filtering liquids, namely, water and beverage filtering apparatus; liquid, air and gas filters, namely, beverage, milk, liquid food, air and gas filters for industrial use; candle filters for liquids, air and gases, namely, candle filters for liquids, air and gases for industrial use; filter installations in the nature of beer and wine filtering units; beer stabilising filters, namely, filtering units for stabilising beer; wort filters, namely, filters for filtering beer wort; ceramic filters for liquids, air and gases, namely, ceramic filters and filtering devices for water conditioning; water filters; air filters, for industrial purposes; filters for gases, namely, filters and filtering devices for air and gas conditioning