Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing

3331 Agriculture, Construction, and Mining Machinery Manufacturing 3332 Industrial Machinery Manufacturing 3333 Commercial and Service Industry Machinery Manufacturing 3334 Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing 3335 Metalworking Machinery Manufacturing 3336 Engine, Turbine, and Power Transmission Equipment Manufacturing 3339 Other General Purpose Machinery Manufacturing