four-knife
four-layer
four-leg
four-level
four-line
four-lobed
four-oar
four-oared
four-pass
four-plate
  four-point
fourpolar
four-pole
four-port
four-probe
four-region
four-roll
four-run
four-spot
four-stoppered
four-strand

    four-point control method

    метод четырёх контрольных точек