горизонталь
contour line (contour)
depression position finder
depression ratio
induction-pipe depression
secondary depression
depression range finder
depression
depression angle
adjacent contour
contour
contour interval
depth contour
index contour line (cart.)
intermediate contour line
supplementary contour
barrel contour
Functional Hardware and Software Contour (FHSC)
wing contour
contour chart
contour flying
contour line
contour search
approximate contour
terrain contour matching (TERCOM, TERRCOM)