[电] line-controlled blocking oscillator

chuán shū xiàn kòng zhì jiàn xiē zhèn dàng qì ㄔㄨㄢˊ ㄕㄨ ㄒㄧㄢˋ ㄎㄨㄥˋ ㄓˋ ㄐㄧㄢˋ ㄒㄧㄝ ㄓㄣˋ ㄉㄤˋ ㄑㄧˋ