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单词 joist
释义 joist/dʒɔist/n. each of a series of parallel supporting beams of timber, steel, etc., used in floors, ceilings, etc. (木料、钢材等的)搁栅;托梁;桁(用于地板、天花板等) joisted adj.[Middle English from Old French giste, ultimately from Latin jacēre ‘lie’]
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