one-of-a-kind
one-off
one-operation
one-operator
one-pair
one-pass
one-phase
one-piece
one-piece-cast
one-point
  one-port
one-position
one-pulse
one-rev
one-sensor-one
one-shaft
one-shift
one-shot
one-sided
one-stage
one-step

    one-port valve

    однолинейный распределитель