[计] full-electronic switching system
quán diàn zǐ jiāo huàn jī xì tǒng ㄑㄩㄢˊ ㄉㄧㄢˋ ㄗˇ ㄐㄧㄠ ㄏㄨㄢˋ ㄐㄧ ㄒㄧˋ ㄊㄨㄥˇ