narrow gauge

noun
🔊/ˈnærəʊ ɡeɪdʒ/
🔊/ˈnærəʊ ɡeɪdʒ/
[uncountable]
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  1. a size of railway track that is not as wide as the standard track that is used in the UK and the US窄轨
    • a narrow-gauge railway窄轨铁路
    Topics Transport by bus and trainc2