This U.S. industry comprises establishments primarily engaged in manufacturing general purpose machinery (except ventilating, heating, air-conditioning, and commercial refrigeration equipment; metal working machinery; engines, turbines, and power transmission equipment; pumps and compressors; material handling equipment; power-driven handtools; welding and soldering equipment; packaging machinery; industrial process furnaces and ovens; fluid power cylinders and actuators; fluid power pumps and motors; and scales and balances). Manufacturing ventilating, heating, air-conditioning (except motor vehicle), and commercial refrigeration--are classified in Industry 33341, Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing; Manufacturing motor vehicle air-conditioning systems and compressors--are classified in U.S. Industry 336391, Motor Vehicle Air-Conditioning Manufacturing; Manufacturing metalworking machinery--are classified in Industry Group 3335, Metalworking Machinery Manufacturing; Manufacturing engine, turbine, and power transmission equipment--are classified in Industry Group 3336, Engine, Turbine, and Power Transmission Equipment Manufacturing; Manufacturing pumps and compressors--are classified in Industry 33391, Pump and Compressor Manufacturing; Manufacturing material handling equipment--are classified in Industry 33392, Material Handling Equipment Manufacturing; Manufacturing power-driven handtools--are classified in U.S. Industry 333991, Power-Driven Handtool Manufacturing; Manufacturing welding and soldering equipment (except handheld soldering irons)--are classified in U.S. Industry 333992, Welding and Soldering Equipment Manufacturing; Manufacturing packaging machinery--are classified in U.S. Industry 333993, Packaging Machinery Manufacturing; Manufacturing bakery ovens and cement, wood, and chemical kilns--are classified in U.S. Industry 333298, All Other Industrial Machinery Manufacturing; Manufacturing industrial process furnaces and ovens (except bakery)--are classified in U.S. Industry 333994, Industrial Process Furnace and Oven Manufacturing; Manufacturing fluid power cylinders and actuators--are classified in U.S. Industry 333995, Fluid Power Cylinder and Actuator Manufacturing; Manufacturing fluid power pumps and motors--are classified in U.S. Industry 333996, Fluid Power Pump and Motor Manufacturing; Manufacturing scales and balances (except laboratory)--are classified in U.S. Industry 333997, Scale and Balance (except Laboratory) Manufacturing; Manufacturing carnival and amusement park equipment, automotive maintenance equipment and coin-operated vending machines--are classified in Industry 33331, Commercial and Service Industry Machinery Manufacturing; Manufacturing motor vehicle engine filters and pumps--are classified in Industry Group 3363, Motor Vehicle Parts Manufacturing; and Manufacturing mechanical jacks--are classified in U.S. Industry 332212, Hand and Edge Tool Manufacturing.