最終更新日：2024/08/06

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(rail transport, usually in the plural) One of the two rails of a railway track with which the wheels of a train make contact. / (horse racing) A fence which marks the inside edge of a racecourse.

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running rail

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running rail

noun

(rail transport, usually in the plural) One of the two rails of a railway track with which the wheels of a train make contact. / (horse racing) A fence which marks the inside edge of a racecourse.