mechanical optimal problems
mechanical optimal problems
力学最优问题
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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As for the problems of optimal design on mechanical products, it is quite difficult to make a correct decision in the stage of scheme design due to too many involved factors.
对于机械产品优化设计问题，由于涉及因素较多，在方案设计阶段很难作出正确决策。
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