cloth roof - commuter railroad
- coil magnetometer
- coil of wire
- coil pipe
- coil spring
- coil tail
- coil-type evaporator
- coiled radiator
- coiled steel
- coiled strip
- coiled tubes
- coiling length of drum
- coin
- coin lock
- coincidence
- coincidence of axes
- coke
- coke cement concrete
- coke kiln
- coke oven
- COL
- colcrete
- cold
- cold air inleak
- cold air machine
- cold air stream
- cold application
- cold asphalt
- cold asphalt concrete
- cold asphaltic concrete
- cold bending test
- cold binder
- cold bituminous road
- cold bridging
- cold brittleness
- cold chisel
- cold deck
- cold drawing
- cold feed
- cold forming of profiles in a rolling mill
- cold generation