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单词 缩管
释义 DEFINITIVE EXAMPLES 权威例句〔drawtube〕A tube that slides within another tube, as in a small hand telescope.伸缩管:在另一管筒中滑动的管筒,如小型手持望远镜中的伸缩管美国传统〔pipe〕Metallurgy A cone-shaped cavity in a steel ingot, formed during cooling by escaping gases.【冶金学】 (铸件的)缩孔,缩管:铸件上的锥形孔,用来在冷却时排气用美国传统〔pipe〕Metallurgy To develop conical cavities during solidification.【冶金学】 形成缩管:凝固时形成缩孔美国传统〔slide〕He oiled the slide of his trombone.他给长号的伸缩管上油。韦氏高阶
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