| 420000 | Process Heating, Cooling and Drying Equipment |
| 42181* | Construction and Mining (except Petroleum) Machinery and Equipment |
| 423110* | Automobile and Other Motor Vehicle Merchant Wholesalers |
| 423120* | Motor Vehicle Supplies and New Parts Merchant Wholesalers |
| 423390* | Other Construction Material Merchant Wholesalers |
| 423610 | Electrical Apparatus-Equip., Wiring Supplies-Related Equip. Merch. Who |
| 423700* | Hardware, Plumbing & Heating Equipment & Supplies |
| 423710* | Hardware Merchant Wholesales |
| 423720* | Plumbing and Heating Equipment and Supplies |
| 423730* | Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant |
| 423810 | Construction and Mining Machinery and Equipment Wholesalers US |
| 423830* | Industrial Machinery and Equipment Merchant Wholesalers |
| 4247 | Petroleum and Petroleum Products Merchang Wholesales |
| 424710 | Petroleum Bulk Stations and Terminals |
| 425120* | Manufacturers Representative Wholesale Trade Agents & Brokers |