detector bar

English

detector bar (plural detector bars)

(railways) A bar, connected with a switch, longer than the distance between any two consecutive wheels of a train, laid inside a rail and operated by the wheels so that the switch cannot be thrown until the entire train has passed the switch.

单词	detector bar
释义	detector bar English Noun detector bar (plural detector bars) (railways) A bar, connected with a switch, longer than the distance between any two consecutive wheels of a train, laid inside a rail and operated by the wheels so that the switch cannot be thrown until the entire train has passed the switch.
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