11 Refrigerating and freezing equipment, namely, chilling and freezing condensing units, refrigerators, freezers, refrigerating cabinets, walk-in refrigerators, refrigeration condensers, heat exchangers, other than parts of machines, and cooling evaporators; commercial refrigeration units, namely, refrigeration condensers, refrigerating cabinets, walk-in refrigerators, and blast chillers for commercial food preparation and storage; industrial cooling installations for industrial refrigerators and refrigeration condensers; refrigerating machines; refrigerating installations; refrigerating chambers; refrigerant condensers; gas condensers, other than parts of machines; evaporators for industrial refrigerators and refrigeration condensers; suction separators for industrial refrigerators and refrigeration condensers; parts and fittings for refrigerating and freezing equipment