cold tinning

例句：

1. 1. The steelwas cold tinned to improve its strengthand toughness.
   钢材经过冷加工以提高其强度和韧性。
2. 2. Cold tinning isa technique used in the production of stainlesssteel.
   冷加工是一种用于生产不锈钢的技术。
3. 3.The process of cold tinning involves heatingthe metal to a very high temperature beforebeing cooled quickly.
   冷加工过程涉及将金属加热至非常高的温度，然后迅速冷却。