The resulting machining marks are, therefore, a helix having a very small pitch, which is equal to the feed. Consequently, the machined surface is always cylindrical.
所以，由此产生的机加工痕迹是一条具有很小节距的螺旋线，该节距等于进给。因此机加工表面始终是圆柱形的。
By using a particle image velocimetry (PIV), an experimental study was performed on the swirling flow of viscoelastic fluid with deformed free surface in a cylindrical container.
利用粒子图像测速仪(PIV)对圆筒形容器内有自由表面变形的粘弹性流体旋转流动进行了实验研究。
This paper proves that the geodesic on the positive spiral surface is a cylindrical spiral, which can be calculated with the parameters on the positive spiral surface.
本文研究证明，正螺面上的短程线就是一根圆柱螺线，可根据正螺面的参数准确计算出其数值。
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