职业病防治实行“三级预防”原则,一级预防又称病因预防,是指改进生产工艺和生产设备,合理利用防护设施和个人防护用品,以减少工作接触的机会和程度,从而从根本上杜绝危害因素对人的作用;二级预防又称发病预防,是指早期检测人体受到职业危害因素所致的疾病,其主要手段为定期进 Prevention of occupational diseases implementation of the “three prevention” principle, also known as prevention of a prevention, also refers to the improvement of production technology and production equipment, rational use of protective equipment and personal protective equipment to reduce the chances of work contacts and to fundamentally put an end to Hazard factors on the human role; secondary prevention, also known as disease prevention, refers to the early detection of human occupational hazards caused by the disease, the main means of regular