1. The influence factors on twist irregularity of folded yarn were analyzed to reduce the twist irregularity. Ϊ���������Ȳ��ȣ���Ӱ��������Ȳ��ȵ����ؽ����˷�����
2. The influence factors on twist irregularity of folded yarn were analyzed to reduce the twist irregularity. Ϊ���������Ȳ��ȣ���Ӱ��������Ȳ��ȵ����ؽ����˷�����
3. The influence factors on twist irregularity of folded yarn were analyzed to reduce the twist irregularity. Ϊ���������Ȳ��ȣ���Ӱ��������Ȳ��ȵ����ؽ����˷�����
4. Through diffraction inverse ratio relation and quantization of geometrical optics, the transition between geometrical optics and wave optics was discussed. ͨ�����䷴�ȹ�ϵ�ͼ��ι�ѧ�����ӻ��������˼��ι�ѧ�Ͳ�����ѧ�Ĺ������⡣
5. Through diffraction inverse ratio relation and quantization of geometrical optics, the transition between geometrical optics and wave optics was discussed. ͨ�����䷴�ȹ�ϵ�ͼ��ι�ѧ�����ӻ��������˼��ι�ѧ�Ͳ�����ѧ�Ĺ������⡣