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Third rail
01
第3のレール, 電力供給レール
an additional rail providing electric power to trains, often used in subway systems
third rail
n
例
The third rail system improved train efficiency.
The third rail ran alongside the regular tracks.
The subway train drew power from the third rail.
They installed a new third rail for the metro extension.
She was warned to stay clear of the electrified third rail.
