[电] double-wind-ing synchronous generator
shuāng rào zǔ tóng bù de fā diàn jī ㄕㄨㄤ ㄖㄠˋ ㄗㄨˇ ㄊㄨㄥˊ ㄅㄨˋ ㄉㄜ˙ ㄈㄚ ㄉㄧㄢˋ ㄐㄧ