standby airspeed indicator
/ˈstandbaɪ ˈeəspiːd ˈɪndɪkˌeɪtə/
n
English · standby airspeed indicator中文 · 备用空速表Español · anemómetro de emergenciaFrançais · anémomètre de secours
意味：Instrument that shows the aircraft’s speed; it is used in the event the flight display fails.