The PPM(Pulse Positioning Modulation) of the BPL signal is the key problem to expanding the BPL channel as a communication channel.是什么意思_The PPM(Pulse Positioning Modulation) of the BPL signal is the key problem to expanding the BPL channel as a communication channel.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句