frequency-modulated carrier current telephony

手机通讯行业专业... ... 调频载波电流电话 frequency-modulated carrier current telephony 调频制 frequency modulation system ...

手机通讯行业专业英... ... 调频制 frequency modulation system 调频制载波电话 frequency-modulated carrier current telephony ...

... carrier-current relaying 载频中继 frequency-modulated carrier current telephony 调频式载波电话，调频载波电流电话 ...