frequency division system 分频制 ; 频率分割制 ; [通信] 频率划分制 ; 频率分隔制
frequency division multiplex system 分频多路传输方式
frequency division switching system 频率分割制交换机
frequency division multiplex telegraph system [通信] 频分多路复用电报系统
Frequency Division Colour Television System 分频式彩色电视制
Orthogonal Frequency Division Multiplexing System 正交频分复用技术
frequency-division telemetry system 频分制遥测系统
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