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 boxannealing 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.