编码正交频分调制 COFDM
编码正交频分复用调制 COFDM
正交频率数字调制 orthogonal frequency digital modulation
正交频分调制 Orthogonal Frequency Division Multiplexing ; Orthogonal Frequency Division Modulation
正交频分复用调制 Orthogonal Frequency Division Multiplexing ; OFDM
脉频调制交错控制 Pulse-Frequency-Modulation interleaved control
正交频分复用调制方式 OFDM
交流变频调速控制系统 ac frequency speed-changing system
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