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。
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.
通过对旋翼导纱机构导纱运动的分析，提出了导纱板工作曲线形状的设计原理。
Then, by analyzing the traversing motion of the yarn which is controlled by the rotary blades and guide board, the design principle of the guide board profile is presented.
该文研究了曲线拟合参数与曲线形状胖瘦的关系，结合舌体的长宽比，实现了舌体胖瘦的自动定量分析。
Combined with the proportion of length to width of tongue, the automatic quantitative analysis of plumpness and slenderness of tongues is realized.
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