中文说明： 布袋工艺的不带破损面积计算处理。根据不同时段不带破损的数目和更换频率，处理数据并且得到布袋破损面积的平均影响因素，进一步分析提高布袋寿命的各项因素
English Description：
Bag without the technology of the damaged area. According to different periods without damage to the number and frequency of replacement, process the data and get a bag average impact factor of the damaged area, further analysis of various factors increased bag life