Improvement on Welded Structure for End to End Joint Sleeves of the Motor Rotor as well as Argon-arc Welding是什么意思_Improvement on Welded Structure for End to End Joint Sleeves of the Motor Rotor as well as Argon-arc Welding在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句