理学 局域网 释 hub 集线器 在计算机网络中配置成星形的中心功能单元。它协调在站之间的数据通信，并可以提供对其他计算机网络的接入。
网络与数据通信 协议体系与组成结构 释文 hub 集线器
- primary standard of diffuse transmitted visual
- primary standard of exposure
- primary standard of flatness
- primary standard of illuminance
- primary standard of laser small angle
- primary standard of laser wave length
- primary standard of length
- primary standard of line angle
- primary standard of luminance
- primary standard of luminous exposure
- primary standard of luminous intensity
- primary standard of microwave phase shift
- primary standard of multi-teeth index table
- primary standard of spectral irradiance
- primary standard of spectral radiance
- primary standard of taper gauge
- primary standard of total luminous flux
- primary standards of national defense
- primary star
- primary station
- primary station, master station
- primary stress
- primary structure
- primary structure analysis of monoclonal antibody
- Primary Studies on the Book of Songs