| Naics index | Naics index description |
|---|---|
| 333120 | Tractors and attachments, construction-type, manufacturing |
| 333120 | Tractors, crawler, manufacturing |
| 333120 | Trenching machines manufacturing |
| 333120 | Trucks, off-highway, manufacturing |
| 333120 | Vibrators, concrete, manufacturing |
| 333131 | Amalgamators (i.e., metallurgical and mining machinery) manufacturing |
| 333131 | Augers, mining-type, manufacturing |
| 333131 | Bits, rock drill, underground mining-type, manufacturing |
| 333131 | Breakers, coal, manufacturing |
| 333131 | Cars, mining, manufacturing |