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1·The box adopts annealing or movement to eliminate stress, reduce deformation and ensure quality. The surface is subject to sand blasting to achieve elegant appearance.

箱体采用退火或移动消除应力，减少变形，从而保证质量，表面采用喷砂处理，从而使外观美观大方。

2·In box annealing a ferrous alloy, the charge is usually heated slowly to a temperature below the transformation range, but sometimes above or within it, and is then cooled slowly.

将一种金属或合金放在一个密闭容器中对其退火。在对某一铁基合金进行闭箱退火时，通常将装料缓慢加热到低于(但有时高于或位于)转换温度范围的某一温度，然后缓慢冷却。