三层
三层[sān céng]1.■three layers; three storeys三层板 three ply board三层版 tripack三层办公桌 three-decker三层包线 triple covered wire三层彩色片 tripack三层刺网 trammel net; coracle net三层道路 triple-decker三层二极管 {电子} three-layer diode三层法 three-layer process三层钢 compound steel三层甲板舰 three-decker三层立体交叉 triple-decker三层流网 drift trammel net三层抹灰 render float and set三层坡度减小筛 {采矿} trislope screen三层筛 triple-deck screen三层书架 three-decker
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