underpann.底盘(拖盘)
underprep.低于;在 ... 下;在 ... 内;在 ... 控制下adv.在昏迷中;在 ... 下adj.下面的;从属的;少于的
under the disguise ofadj.伪装(以 ... 为借口)
undervoltage tripping低电压跳闸
undervoltage detector欠压检测器
underplating of magma岩浆底侵
undercorrected lenses透镜矫正不足
under-the-counteradj.私下出售的;违法的
underlying substratum下卧层
undercrossing project穿黄工程
underlying put option原生看跌期权
under frequency relay低频率继电器