[电] closed loop automatic controal system

bì huán zì dòng kòng zhì xì tǒng ㄅㄧˋ ㄏㄨㄢˊ ㄗˋ ㄉㄨㄥˋ ㄎㄨㄥˋ ㄓˋ ㄒㄧˋ ㄊㄨㄥˇ