piecewise smooth closed curve 分段光滑闭曲线
At last, the closed processing paths were indicated by a seal smooth curve that had solved the problem of identifying the close processing paths.
最终加工路线由一条封闭的光滑的自由曲线表示，解决了闭合加工路径的识别问题。
A smooth power curve, not easy to have a super power, but this type of impeller cavitation performance than ordinary closed impeller, especially suitable for use in the pump pressure on imports.
功率曲线比较平稳，不易产生超功率的问题，但该型叶轮的汽蚀性能不如普通闭式叶轮，尤其适宜用在有压进口的泵上。
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