Methods: To survey by self design questionnaire and assess the pain by digital grading.
方法：运用自行设计问卷进行调查，并用数字分级法进行疼痛评估。
2
The effectiveness of the method in textile clustering and grading is proved by using 43 cotton samples which are self-knitted by Ecole Nationale Supérieure des Arts et Industries Textiles, France.
Through the filter protective soil tests and fissure self healing tests, the filter design standard of the wide grading anti seepage materials of Shuibuya Project is given.