"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