dumb waiter
noun [ C ] uk/ˌdʌm ˈweɪ.tər/ us/ˌdʌm ˈweɪ.t̬ɚ/
（尤指饭店中将食物从厨房送到不同楼层的）升降架
a small lift (= device used to move things from one level of a building to another) used especially in restaurants to bring food from the kitchen
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