The warp threads close round the pick just inserted as the shed changes for the next pick and attempt to crimp it. If the pick is to crimp, either it must stretch or the cloth must contract width way, or both must happen.

• 在梭口变化时经纱包紧新纳入的纬纱,并使纬纱有屈曲的倾向,如果纬纱有屈曲,纬纱必须伸长或织物必须沿宽度方向收缩,或二者同时发生。