"dual" - key terms from Wikipedia

dual
dual adjustable dampers with coil
dual agency
dual alliance
dual analog
dual analog controller
dual carriageway
dual channel
dual channel rimm specified
dual citizenship
dual clutch transmission
dual combat sighting system
dual core
dual cover
dual cyclone
dual degree
dual energy
dual exhaust
dual exhaust option
dual federalism
dual floppy disk drive
dual fuel
dual gauge
dual language
dual layer
dual link
dual link dvi
dual mode
dual mode operation
dual monarchy
dual mono
dual nationality
dual number
dual nvidia geforce
dual polyhedron
dual rectifier
dual role
dual shock
dual sim
dual space
dual sports
dual stack
dual strike
dual suspension
dual usb
dual wheels
high quality dual carriageway
pentium dual core
rotary valve single dual purpose
stroke rotary valve single dual