网络与数据通信 有线网络 释文 supervisory frame 监控帧
- variable-structure
- variable structure automaton
- variable structure control
- variable structure control system
- variable-structured system
- variable structure guidance law
- variable symbol
- variable temperature blackbody radiation source
- variable temperature control of greenhouse
- variable term
- variable thrust rocket engine
- variable thrust rocket motor
- variable time scale
- variable transformation
- variable ultrafast photographic shutter
- variable ultraviolet object
- variable valve lift
- variable valve mechanism
- variable valve timing
- variable valve timing system
- variable-velocity star
- variable voltage
- variable water flow central air-conditioning system
- variable X-ray source
- variable γ-ray source