Provide closed loop service enable to resolve environmental hazard material and junk material issues 提供闭环供应服务，解决客户的费旧物料管理问题。
2.
It should combine the data of concentration field of hazard materials in smoke to analyze the effectiveness of the smoke management system 应当结合烟气有害成分的浓度场分布来分析和评价烟气的危害性程度和烟气控制系统的效率。
