air brake
US /ˈer breɪk/
UK /ˈer breɪk/
1.
freio a ar, freio pneumático
a brake operated by compressed air, used especially on heavy vehicles such as trucks and trains
:
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The truck driver applied the air brake to slow down on the steep decline.
O motorista do caminhão acionou o freio a ar para diminuir a velocidade na descida íngreme.
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Trains rely on powerful air brakes for safe stopping.
Os trens dependem de potentes freios a ar para uma parada segura.