| 333131 |
Rock drills, underground mining-type, manufacturing |
| 333131 |
Scraper loaders, underground mining-type, manufacturing |
| 333131 |
Screening machinery, stationary, manufacturing |
| 333131 |
Sedimentary mineral machinery manufacturing |
| 333131 |
Sieves and screening equipment, mineral beneficiating, manufacturing |
| 333131 |
Stone beneficiating machinery manufacturing |
| 333131 |
Underground mining machinery manufacturing |
| 333131 |
Washers, aggregate and sand, stationary, manufacturing |
| 333132 |
Bits, rock drill, oil and gas field-type, manufacturing |
| 333132 |
Christmas tree assemblies, oil and gas field-type, manufacturing |