[电] pulse-width modulation-frequencymodulation

mài chōng kuān dù tiáo zhì pín lù: tiáo zhì ㄇㄞˋ ㄔㄨㄥ ㄎㄨㄢ ㄉㄨˋ ㄊㄧㄠˊ ㄓˋ ㄆㄧㄣˊ lu:4 ㄊㄧㄠˊ ㄓˋ