fine annealing

例句：

1. 1. The steel was finely annealed to improve its strength and toughness.
   该钢材经过精细退火以提高其强度和韧性。
2. 2.Fine annealing is essential for the production of high-quality steel products.
   精细退火对于生产高质量钢材产品至关重要。
3. 3.During the manufacturing process, fine annealing is used to eliminate internal stresses in the material.
   在制造过程中，使用精细退火来消除材料内部的应力。