On the basis of a comparative analysis of various pole-changing and speed-adjusting schemes for marine AC three-speed winch motors, the paper presents a new design adopting a patent method which changes pole by changing the unit ampere conductor.是什么意思_On the basis of a comparative analysis of various pole-changing and speed-adjusting schemes for marine AC three-speed winch motors, the paper presents a new design adopting a patent method which changes pole by changing the unit ampere conductor.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句