two-strand anneal and pickle line

例句：

1. 1. The metal was annealed to remove any internal stresses.
   金属被退火以去除任何内部应力。
2. 2.The chef annealed the steaks before cooking them.
   厨师在烹饪牛排前将它们退火。
3. 3. Annealing is a process used in metalworking to improve the strength and toughness of the material.
   退火是一种金属加工过程，用于提高材料强度和韧性。