Thirty thirty spokes, when there is no, there is a car; 埏埴 埏埴 埏埴 器 器 其 其 其 其;;; 为;;;; 为; Therefore, there is a profit, it is not used.
Thirty spokes are concentrated on a hub, because of the space in the hub, there is a car's role; 抟糅 clay manufacturing utensils, there is a space in the middle of the vessel, only with the effect of the vessel The built-in door and window construction is because of the space in the house, there is a housing role. Therefore, it has brought convenience to people, but the role of the utensil is due to space.
