该文用基于实验设计法的稳健性结构设计方法，对结构进行了广义的和狭义的稳健性设计。
The robust optimum design was made for a structural design with uncertainties based on the experimental design method.
这表明，用这一方法可对凝固晶粒尺寸进行控制和预测，为优化实验设计提供了简便实用的手段，具有较大的实用价值。
This method may be used to control and predict the solidified grain size, provide a concise means for optimizing experimental design, and be of big practical value.
方法：用均匀实验设计法优选工艺条件。
Method: Use the design method of even experiment to choose the better technology conditions.
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