data circuit terminating equipment
DCA digital command assembly数字指令装置 DCE data circuit terminating equipment数据通讯线路终端设备 DCF digital comb filter数字梳状滤波器 ..
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DCE E data circuit terminating equipment
... DCA A digital command assembly 数字指令装置 DCE E data circuit terminating equipment 数据通讯线路终端设备 DCF F digital comb filter 数字梳状滤波器 ...
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