Internal rolling on C6140 lathe is easy to operate and can ensure internal fineness of the parts.The cold-work hardening on rolled internal surface can increase its abradability and fatigue strength.是什么意思_Internal rolling on C6140 lathe is easy to operate and can ensure internal fineness of the parts.The cold-work hardening on rolled internal surface can increase its abradability and fatigue strength.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句