工学 〔智能空管〕 释 unmanned aircraft; UA 无人驾驶航空器 没有机载驾驶员操控，通过双向传输指挥与控制数据链路进行飞行活动的遥控驾驶或者自主驾驶的航空器。不包括航空模型、无人驾驶自由气球等。又称远程驾驶航空器。
网络与数据通信 网络应用 释文 mail user agent, user agent, UA 邮件用户代理
- free unknown
- free variable
- free-variable
- free vector
- free verse
- free vertex
- free vibration
- free-volume model
- free volume model of diffusion
- free volume theory
- free vortex
- free vortex layer
- free walk
- free water
- free water knockout
- freeway
- freeway ETC system
- Freeway in Federal Republic of Germany
- freeway surveillance and control
- freeway surveillance and control system
- Free Weekly
- free will theory
- Free-Wilson addition model
- freeze concentration equipment
- freeze damage