单词	isotach
释义	isotach isotach (ˈaɪsəʊˌtæk) n (Physical Geography) a line on a map connecting points of equal wind speed[from iso- + Greek takhos speed] Translations isotacaisotaquia isotach isotach [′ī·sə‚tak] (meteorology) A line in a given surface connecting points with equal wind speed. Also known as isokinetic; isovel. isotach A line on a weather chart showing equal, or constant, wind speed. These are generally drawn on high-level charts, generally 500 millibars and higher. These are short dashed lines labeled in knots and are normally indicated for intervals of 20 knots, where space permits. Isotachs, however, do not indicate wind direction. ThesaurusSeecontour line
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