circ - coal
- circle
- circle jack
- circuit
- circuit breaker
- circuit breaker closing
- circuit breaker opening
- circuit closed in standby position
- circuit closed in working position
- circuit in service
- circuit in standby
- circuit interlocking
- circuit tester
- circuit-breaker
- circuit-breaker operator
- circuit-closing apparatus
- circuit-opening contact
- circuitry
- circular
- circular airway
- circular arc
- circular bar
- circular chain conveyor
- circular chute door
- circular closet support
- circular cooler
- circular cross-section of a roadway
- circular cut
- circular drivage machine
- circular face
- circular girder
- circular jib
- circular lining
- circular motion screen
- circular ring to take pressures
- circular rotor speed
- circular saw
- circular section
- circular shaft
- circular steel support
- circular teeth
