This article also puts forward the concept and evaluation method of the stable critical point of the pressure drop. therefore it has supplied the basis for deter - mining the optimum transfer plan.
本文还提出了在生产实际中有意义的压降稳定临界点的概念和求法，为确定最佳输送方案提供了依据。
The hysteresis direction at the optimum measuring pressure point on top wall is opposite to that on bottom wall.
风洞顶壁上最佳测压点非定常压力迟滞环方向与风洞底壁上对应最佳测压点非定常压力迟滞方向相反。
Effect of impeller of different blade profile on the highest pressure point, optimum operating point, shape of pressure curve and efficiency of the fan were analyzed.
分析了不同叶片型线叶轮对风机的最高压力点、最佳工况点、压力曲线形状及效率的影响，同时探讨了风机不同叶片型线的工程实用价值。
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