1. With the electron microscope much greater magnification can be obtained. ʹ�õ������������Ի�ô�ö�ķŴ��ʡ�
2. The Paper products have clean, soft features, apply to clean microscope film, camera lens, magnifying glass lens, the TV screen, and other optical equipment. ��Ʒ����ֽ�ʽྻ���������ص㣬�����ڲ�������Ƭ���������ͷ���Ŵ�Ƭ������ӫ�����ȹ�ѧ������
3. In the experiment, the photography method was used to record the crack growth and the optical microscope was used to observe and analysis the cutting quality of the samples. ��ʵ����������Ӱ������¼�����Լ����и���������Ƴɳ������Σ���ʹ�ù�ѧ�����۲�����Լ��и��֮Ʒ�ʡ�