工学 产品设计理论与方法研究的历史 释 computer aided design; CAD 计算机辅助机械设计 设计者以计算机作为工具，以工程应用软件作为支撑平台，运用自身的知识和经验，对产品或工程进行方案构思、总体设计、工程分析、图形编辑和技术文档整理等设计活动的总称。
计算机应用 计算机辅助设计与图形学 释文 computer-aided mechanical design 计算机辅助机械设计
- Unfaithful Angels
- unfaithful representation
- unfavorable
- unfavorable complexion
- unfavorite geology in tunnel and underground engineering
- unfavoured transition
- UNFCCC
- Unfederated Malay States
- unfill
- unfilled aperture
- unfilled aperture radio telescope
- unfilled shell
- unfilled shell, incomplete shell
- unfilled state
- unfiltered
- unfinished
- unfinished business
- Unfinished Comedy
- unfinished game
- unfixed-sum insurance
- unflattened cone
- unflattened wedge
- unfocused
- unfocused interaction
- unfold