The variational analysis of spiral case and stay ring's strength.
蜗壳座环强度的变量化分析。
The ellipse section spiral case can give excellent hydraulic performance by optimizing design.
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，椭圆型蜗壳可获得优异的水力性能。
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