Circular cylinder is a basic move along a straight line trajectory can be considered as a collection of the same diameter of the circle, if the horizontal section of film, then it is a straight line.
圆筒是基本的圆沿着直线移动的轨迹，可以考虑为相同直径的圆的集合，如果水平放置节片的话它就是直线。
Using the theory of compensation effect between compress ratio and the length of straight section, the pressure of flow channel were mainly study according its influence on melt line.
利用压缩比与平直段的长度存在补偿效应的结论，从压力分布及压力降的比较中考察其对熔接痕形成的影响。
In this paper the motion of a straight vortex line in a water tunnel having a square cross section is discussed.
本文讨论了正方形截面水筒中直线涡的运动。
In this paper the motion of a straight vortex line in a water tunnel, which has a square cross section, is discussed.
本文讨论了正方形截面水筒中直线涡的运动。
Given a hexagon inscribed in a conic section, the three pairs of the continuations of opposite sides meet on a straight line, called the Pascal line.
已知一个六边形内接于一条圆锥曲线，那么这个六边形对边的交点位于同一条直线上。
Given a hexagon inscribed in a conic section, the three pairs of the continuations of opposite sides meet on a straight line, called the Pascal line.
已知一个六边形内接于一条圆锥曲线，那么这个六边形对边的交点位于同一条直线上。
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