A real complicated engineering surface was used to verify its properties in extraction of mean line and roughness and satisfactory results were obtained.
对一个实际工件进行测量提取表面中线和粗糙度，结果令人满意。
It makes the application of the mean-stream-line method in large space cascade design possible with the optimized given velocity distribution along suction surface also guaranteed.
应用本法计算了一些有严格解的流动，从而给出了推荐使用的展开流线数及计算站数；
What do we mean to talk about a straight line on a curved surface?
关于曲面上的直线，我们指的是什么？
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