With high pressure acting on the surface, the wall thicknesses of a vacuum box should be well designed.
真空箱在工作时，由于要承受较大的压力，需要合理设计其壁厚。
Once joined, and while still hot, the parts may be pulled apart slightly to reduce the wall thicknesses at the weld joint.
一旦焊接并且部件还是热的时候，可将部件稍微拉开以减少焊接接头处的壁厚。
Bearing in mind it is then necessary to optimize wall thicknesses and bearing types and sizes for compactness and durability.
铭记然后必须优化壁厚和轴承类型和尺寸的紧凑和耐用性。
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