通过优化设计，取得了很好的实际效果。
通过优化设计，椭圆型蜗壳可获得优异的水力性能。
The ellipse section spiral case can give excellent hydraulic performance by optimizing design.
通过优化设计，可节省材料，进一步提高结构的抗震性能。
Through optimization, the structural aseismic ability increases with the decrease of structural material consumption.
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