空速指示器空速表示器

在下降到3000英尺的过程中，一只大天鹅很快越过，撞坏了空速管。真空速表失效。

spray deflector air-cushion vehicle

being controlled dependent on air throttle valv

supply of additional air for additional air(secondary air)

circulating-air baking oven

dry-type air cooler

air bladder

Filter-type Air Extractor

water jet air ejector