mechanical variometer
/mɪkˈanɪkəl vˌeəɹɪˈɒmɪtə/
n
English · mechanical variometer中文 · 机械升降速度表Español · variómetro mecánicoFrançais · variomètre mécanique
意味：Device that indicates the glider’s vertical rate of climb or descent by mechanical means.