ORB=omnidirectional radio beacon 全方向无线电信号
ORB 全称：Observatoire Royal de Belgique。比利时皇家天文台
系统软件 中间件 释文 object request broker, ORB 对象请求代理
- onboard information system
- on-board information terminal
- on-board telescope
- on-board unit
- on-bottom stability of jacket
- On Calligraphy
- on-camera correspondent and reporter
- On Canadian Poetry
- Once Again on the Trade Unions, the Present Situation and the Mistakes of Trotsky and Bukharin
- once primed quantity
- once-through boiler
- once-through boiler modulation control system
- once-through boiler start-up
- once-through correcting plate
- once-through corrector
- once through fuel cycle
- once-through fuel cycle
- once-through steam generator
- Once Upon a Time in America
- Once Upon a Time in Anatolia
- Once Upon a Time in China
- Once Upon a Time in the West
- Once upon Four Robbers
- on China's population policy in the future
- onchocerciasis