The propulsion shaft of the ship is used as the subject;its variable structure control method is studied based on the theory of variable structure control and design method.是什么意思_The propulsion shaft of the ship is used as the subject;its variable structure control method is studied based on the theory of variable structure control and design method.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句