The left test cone clearly shows the improved surface and resistance of free-machining stainless steel when passivated by the A-A-A method.是什么意思_The left test cone clearly shows the improved surface and resistance of free-machining stainless steel when passivated by the A-A-A method.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句