Based on the analysis of industry helical motion, spiral motion model is established, and a "total error" concept is proposed for its error analysis.

本文在对工业螺旋运动理论分析的基础上，建立了螺旋运动的数学模型，并对其误差进行了分析，提出了螺旋运动“全误差”的概念。

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Under the precondition of incompressible flow, fluid spiral motion in SK static mixer tube was resolved into axial beeline motion and circumferential rotation motion.

在流体不可压缩的假设前提下，将流体在SK型静态混合器中的螺旋形运动分解成轴向直线运动和环向旋转运动。

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A small ball is making circular motion at the uniform velocity, the centripetal force has suddenly increased, it is proved that the small ball will generally make a spiral motion.

详细讨论了当向心力突然增大后，原来作匀速圆周运动的小球其运动轨迹的变化情况，证明了小球将作螺线运动。

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And the challenge is to combine "the permission to be human" to experience the emotion to go through the motion and yet not to enter the downward spiral where six months later, after small incident, I'm still in that rot.

困难在于将之与准许为人相结合“,去体会情绪，实现转移,但不会进入下行螺旋，在发生小小意外六个月后，仍心情低落。

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