[电] time-constant characteristics of a fuse

róng xiàn de shí jiān diàn liú tè xìng ㄖㄨㄥˊ ㄒㄧㄢˋ ㄉㄜ˙ ㄕˊ ㄐㄧㄢ ㄉㄧㄢˋ ㄌㄧㄡˊ ㄊㄜˋ ㄒㄧㄥˋ