风叶采用流体力学的原理，用解析方法设计，实现更大风量和更小噪音；
Blade uses the principle of fluid dynamics, using analytical method designed to achieve greater air volume and a smaller noise.
风叶采用流体力学的原理，用解析方法设计，实现更大风量和更小噪音；
Blade uses the principle of fluid dynamics, using analytical method designed to achieve greater air volume and a smaller noise.
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