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
- extremal control systems
- extremal convex domain
- extremal correlation
- extremal curvature
- extremal curve
- extremal deformation
- extremal disconnectedness
- extremal distance
- extremal distribution
- extremal domain
- extremal element
- extremal epimorphism
- extremal field
- extremal function
- extremal graph
- extremal graph theory
- extremal group
- extremal horizontal slit mapping
- extremal involution
- extremality
- extremality relation
- extremalization
- extremal lattice
- extremal length
- extremal length with weight