unitool球刃刀盘,统一刀盘unitn.单元；单位；部件；组件unit backspace character单位退格符unit surface conductance单位面积传导unitized channel storage通用的通道存储器Unit Identification Code单位识别代码unit type glass act wall单元式玻璃幕墙unit cost of travel time单位时间成本unit displacement method单位位移法Unit Six Offers and Bids报盘与递盘unitarily invariant norm酉不变范数unit affiliated hospital队属医院