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joist 音标拼音: [dʒ'ɔɪst] n. 托梁,桁 托梁,桁 joist n 1: beam used to support floors or roofs Joist \Joist\ (joist), n. [OE. giste, OF. giste, F. g[^i]te, fr. gesir to lie, F. g['e]sir. See {Gist}.] (Arch.) A piece of timber laid horizontally, or nearly so, to which the planks of the floor, or the laths or furring strips of a ceiling, are nailed; -- called, according to its position or use, {binding joist}, {bridging joist}, {ceiling joist}, {trimming joist}, etc. See Illust. of {Double-framed floor}, under {Double}, a. [1913 Webster] Joist \Joist\, v. t. [imp. & p. p. {Joisted}; p. pr. & vb. n. {Joisting}.] To fit or furnish with joists. --Johnson. [1913 Webster]
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