three-phase
three-plate
three-play
three-point
three-pointer
three-product
three-quarter
three-quarter-wave
three-resonator
three-roller
  three-section
three-slot
three-spar
three-square
three-stage
three-storied
three-story
three-stream
three-throw
three-tiered
three-track

    three-section flap

    трехсекционный закрылок