дуплексний зв’язок, одночасний двосторонній зв’язок
two-way alternate communication
two-seat / two seat
duplex / two-way channel
two-way radio
two-way audiolink
one-way UAV / one-way attack UAV (OWA UAV)
one-way communication
stabilized in two axes
two brigades abreast
two-cycle engine
two-handed riot baton
two-man foxhole
two-prong attack
two-sided exercise
two-stage missile / rocket / vehicle
two-stage solid-propellant ballistic vehicle
two-up formation
two-lane all-weather road
bi-strategic command (Bi-SC) (of the two Strategic Commands )
two-crewmember cockpit
two-man fire trench
four by two
two-aircrew aircraft
two-aisle compartment
two-baffle muzzle brake
one-(two-, three) dimensional steady flow
two-decked plane
two-dimensional flow
two-dimensional element
two-frequency glide path system
two-frequency localizer system
two-pilot crew