若流线型物体表面的摩擦阻力系数仅为相对粗糙度的函数，则形状阻力系数与雷诺数无关。
Since if the frictional resistance coefficient is a function of relative roughness, then the form resistance coefficient is independent of the Reynolds number.
但现代生产中，如某些流线型物体、人体假肢、艺术雕塑品和汽车零件产品，其原始模型并非来自设计概念而是实物产品。
In many situations, however, product is not come from designed conception but from some other entities, and it must be produced without any existing drawing, such as sculpture.
对圆形或流线型的物体来说，形状图子要比不规则的或棱角分明的结构物或部件小得多。
The shape factor is less for rounder or streamlined objects than for irregular or sharp-edged structures or elements.
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