frequency-modulated carrier-curr-ent telephony
frequency-modulated carrier-curr-ent telephony是什么意思、frequency-modulated carrier-curr-ent telephony怎么读
frequency-modulated carrier-curr-ent telephony 基本解释
【电】调频载波电流电话
frequency-modulated carrier-curr-ent telephony是什么意思、frequency-modulated carrier-curr-ent telephony怎么读
【电】调频载波电流电话