char - clas
- chromium firebrick
- chromium impregnation
- chromium ore
- chromium steel
- chromium-molybdenum steel
- chromium-nickel-molybdenum steel
- chromium-plated die
- chromium-vanadium steel
- chromized steel
- chromizing
- chronic exposure
- Chronite
- chrysotile
- chuck
- chuckhold
- chucking device
- chunk reduction
- churly
- churn drill
- churning