In the actual research, the objects are usually circular cylinder, and other objects are mainly squarecylinder and rectangular cylinders which have vertical side walls.
目前的研究对象多为圆柱，非圆柱的结构以方柱和矩形柱为主，且都是有垂直侧壁的柱状结构。
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More than 1,800 tons of steel has formed a 6,000-square-meter, cylinder-shaped structure at the Puxi Shanghai Expo site along the Huangpu River.
The machining characteristics of mold grinding cylinder gear and the solving process of least square circle arc and continuous circular arc are introduced in this paper.