The experiment optimization design method are used to the craft parameters optimal.
运用试验优化设计的方法，优化了工艺参数。
Virtual experiment system of engineering graphics model is a complete new method for teaching process optimization. It can remove the defects of traditional experiment system for engineering graphics.
工程图学模型虚拟实验系统是教学过程优化的一种崭新手段，可以有效地克服传统工程制图实验教学的缺陷。
During different working conditions, we need repeated experiment and optimization for getting the best results of drilling and blasting method.
在不同的工作环境中，需经反复的试验与优化，才能使钻爆法施工获得最佳效果。
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