Many nonferrous materials do not have a definite endurance limit. 許多有色金屬材料沒(méi)有確定的持久極限。
Many problems with the production and application of nonferrous metals have much to do with the atomicdiffusion in them. 有色金屬材料在生產(chǎn)和使用過(guò)程中的許多問(wèn)題與原子擴散密切相關(guān)。