常見例句雙語例句Three methods of surface self-nanocrystallization for iron and steel are ultrasonic shot peening, high energy shot peening and surface mechanical attrition treatment.實現鋼鉄材料表麪自身納米晶化的主要方法有超聲噴丸、高能噴丸和機械研磨処理等。 返回 ultrasonic shot-peening