clas - coin
- cofferdam
- coffin annealing
- cog
- COG
- cog down
- cog-wheel ore
- cogged
- cogged bloom
- cogged ingot
- cogging
- cogging back
- cogging engine
- cogging hammer
- cogging mill
- cogging roll
- cogging roll train
- cogging shears
- cogging stand
- cogging-down
- cogging-down roll
- cohenite
- coherency
- coherency between precipitate and matrix
- coherent boundary
- coherent intensity
- coherent interference
- coherent nucleus
- coherent precipitate
- coherent precipitation
- cohesion
- cohesive energy
- cohesive strength
- coil
- coil "opening" machine
- coil annealing
- coil annealing furnace
- coil banding machine
- coil base
- coil box
- coil break