| [331210] Iron and Steel Pipe and Tube Manufacturing from Purchased Steel |
| [332311] Prefabricated Metal Building and Component Manufacturing |
| [332410] Power Boiler and Heat Exchanger Manufacturing |
| [332420] Metal Tank (Heavy Gauge) Manufacturing |
| [332439] Other Metal Container Manufacturing |
| [332919] Other Metal Valve and Pipe Fitting Manufacturing |
| [332996] Fabricated Pipe and Pipe Fitting Manufacturing |
| [332997] Industrial Pattern Manufacturing |
| [333132] Oil and Gas Field Machinery and Equipment Manufacturing |
| [333411] Air Purification Equipment Manufacturing |
| [333414] Heating Equipment (except Warm Air Furnaces) Manufacturing |
| [333415] Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing |
| [333911] Pump and Pumping Equipment Manufacturing |
| [333912] Air and Gas Compressor Manufacturing |
| [333922] Conveyor and Conveying Equipment Manufacturing |
| [333999] All Other Miscellaneous General Purpose Machinery Manufacturing |
| [337124] Metal Household Furniture Manufacturing |
