combustion areacombustion enginecomfortcommentary on plastic designcommercialcommercial airlinecommercial airplanecommercial aluminumcommercial buildingcommercial facilitiescommercial parkingcommercial parking areacommercial planecommercial vehiclecommercial vehicle parkingcommercial watercommercial wrought iron pipecommercial zonecomminutecomminutedcomminutingcomminutioncomminutorcommon brickworkcommon end connectioncommon excavation of structurecommon labourcommon omegacommon ownershipcommon phicommunicationcommunication structurecommunitycommunity facilities plancommutativecommutatorcompcompactcompact sectioncompacted cubic metercompacted cubic yardcompacted earth liningcompacted fine earthcompacted masscompacted rockfillcompacted shalecompacted soilcompacted volumecompactibilitycompacting factor