three-legged
three-level
three-limb
three-lobe
three-loop
three-member
three-mode
three-moment
three-part
three-pass
  three-phase
three-piece
three-pin
three-pipe
three-ply
threepod
three-point
three-pole
three-port
three-position
three-primary

    three-phase motor

    трёхфазный двигатель, трёхфазный электродвигатель