11 Refrigeration Systems for Industrial and Commercial Use Comprised of Compressors, Condensors, Evaporators, and Electrical Controls; Suction Accumulators which Separate Liquid from Vapor Being Conveyed to a Compressor which Is a Component of Industrial and Commercial Refrigerating Systems; Air-Conditioning Systems for Industrial and Commercial Use Comprised of Compressors, Condensors, Evaporators, and Electrical Controls