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
- coal ball
- coal balls
- coal-based alcohols and esters
- coal-based chemical
- coal-based ester synthesis
- coal-based ethanol synthesis
- coal-based fuel
- coal based methanol
- coal-based methanol
- coal-based methanol; ether mixed fuel
- coal-based methanol synthesis
- coal-based mixed alcohols synthesis
- coal-based oxygenates synthesis
- coal basin
- coal basin analysis
- coal-bearing coefficient
- coal-bearing density
- coal-bearing formation
- coal-bearing property
- coal-bearing strata
- coal-bearing system
- coal bed
- coal bedding sets
- coalbed gas
- coalbed gas content