- Drills, bits, and similar equipment (1)
- Drills (portable), rock (1)
- Clarifying machinery, mineral (1)
- Classifiers (metallurgical or mining machinery) (1)
- Crushing, pulverizing, and screening equipment (1)
- Coal breakers, cutters, and pulverizers (1)
- Pulverizers (stationary), stone (2)
- Mine cars, plows, loaders, feeders, and similar equipment (1)
- Feeders, ore and aggregate (2)
- Stamping mill machinery (mining machinery) (1)
