surfaces strengthening的用法和樣例：
例句
- DC-pulsed plasma nitriding has been developed into an important technique for strengthening metallic materials.
脈衝直流等離子滲氮處理已成為金屬材料表面強化的重要方法。 - For remanufacturing of shaft components, a used shaft is used as a work-piece and repaired and modified with advanced surface strengthening technology to realize regeneration.
軸類零件的再製造是以廢舊的軸為毛坯，採用先進的表面強化技術等修復或改造廢舊的軸，使之獲得再生。
