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通过优化设计技术对当前舱门的结构进行了优化减重，得到了满足要求的改进方案。
Through optimizing design technology, the door structure was optimized to reduce weight. The improvement scheme is obtained.
改进后的床身固有频率有明显提高，质量减少了27．5％，达到了拓扑优化减重和材料最佳分配的目标。
The improved lathe bed inherent frequency have increased significantly, the quality has been cut by 27.5%.
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