Occupational harmful factor 基本例句 职业危害因素 Methods According to Hygienic Standards for the Design of Industrial Enterprises, an all-around recognition to harmful factors was performed in small and medium enterprises.方法参照工业企业设计有关卫生标准，识别铁合金生产中小企业的工艺流程中可能存在的职业危害因素。