When a composite video signal is broadcast over the airwaves by a TVstation, it happens on a specific frequency.
当电视台要把组合视频信号经由无线电波广播出去时，要先把它调制到特定频率的载波上。
2
Broadcast And TV System, Nobody station on Duty of Microwave, Communicate Industey Controller, Conputer, System Industry Equipment Sets, Complete set of Lift Meed Rehulated Power Supply Pfbase.
广播电视系统、微波通信无人值守站、工业控制、计算机系统、工业设备配套。
3
Fated to Love was broadcast in advance in Hunan Satellite TVStation.