English Dictionary

vacuum brake

noun

(rail transport) A brake used on trains, working on the principle of keeping up a vacuum in a continuous pipe or pipes extending under the train, and in brake-cylinders connected to them under each vehicle, the air being sucked out by ejectors or pumps on the locomotive.

The train came to a sudden stop thanks to the vacuum brake.

意味（1）

(rail transport) A brake used on trains, working on the principle of keeping up a vacuum in a continuous pipe or pipes extending under the train, and in brake-cylinders connected to them under each vehicle, the air being sucked out by ejectors or pumps on the locomotive.

Consideration of recent pronouncements and predictions shows second thoughts to be practicable, in particular, on the technical decision for which the previous B.T.C. regime was most hotly criticised by experts - the adoption of the vacuum brake as standard for the modernised British Railways. … The original decision to retain the vacuum brake was justified largely on grounds of the intolerable operating convenience that would ensue from a changeover.