The principle, action and control process of permanent magnet driven machinery were introduced, its characteristic was analyzed, and its application to medium pressure vacuum circuit breaker was expounded.是什么意思_The principle, action and control process of permanent magnet driven machinery were introduced, its characteristic was analyzed, and its application to medium pressure vacuum circuit breaker was expounded.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句