contour contour interval等高线
contour vertical interval等高线间隔
contour r interval等高距;等高线间隔
contour-interval等高距
logarithmic contour interval对数等值线距
variable contour interval不定等高线间隔
contour interval note等高距注记
structure contour interval构造等高距
two metres contour interval两米等高距
N（名词） the difference in altitude represented by the space between two contour lines on a map 等高间隔