Research on the Pertinency of Crystallinity, Cooling Technique and Friction Property of Solid Lubricant Based on Polytetrafluoroethylene是什麼意思_Research on the Pertinency of Crystallinity, Cooling Technique and Friction Property of Solid Lubricant Based on Polytetrafluoroethylene在線翻譯_英語_讀音_用法_例句