[电] a-c cemponent of plate current

píng jí diàn liú jiāo liú chéng fèn ㄆㄧㄥˊ ㄐㄧˊ ㄉㄧㄢˋ ㄌㄧㄡˊ ㄐㄧㄠ ㄌㄧㄡˊ ㄔㄥˊ ㄈㄣˋ