[计] facsimile signal level, facsimile-signal level

chuán zhēn xìn hào diàn píng ㄔㄨㄢˊ ㄓㄣ ㄒㄧㄣˋ ㄏㄠˋ ㄉㄧㄢˋ ㄆㄧㄥˊ