If the applied bending force is not sufficient to cause permanent plastic flow at either the inner or outer surfaces, the metal will return elastically to its original shape. 如果实际的弯曲力不足以在内表面或外表面引起永久的塑性流动，金属会自动恢复到原来的形状。
The size of the filament depends on the rate of flow through the hole of the spinneret rather than on the size of the hole. 所制成长丝的直径取决于粘胶在喷丝头孔中的流速，而不取决于孔径的大小。
When viscous forces predominate the flow is proportional to the pressure drop across the element. 当粘滞力起主导作用时，流量当通过主要部分的压力降或正好。
