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工农业生产环境中多种有害因子同时存在是一种非常普遍的现象。例如铸造工的生产环境中有高温、噪声、振动、一氧化碳、金属烟尘和其它刺激性气体;石油精炼时常有多种有机溶剂的蒸气同时存在;水泥厂中同时有高温、粉尘、噪声、振动等因素;农业生产环境中同时有不良气候(高温或低温等)、农药、寄生虫等因素。在生产环境中同时存在二种或二种以上有害因子,劳动者
It is a very common phenomenon that many kinds of harmful factors exist in industrial and agricultural production environment. For example, the foundry production environment has high temperature, noise, vibration, carbon monoxide, metal soot and other irritating gases; petroleum refining is often the existence of a variety of organic solvents vapor simultaneously; cement plant also has high temperature, dust, noise, vibration, etc. Factors; agricultural production environment at the same time there are adverse climate (high temperature or low temperature, etc.), pesticides, parasites and other factors. In the production environment there are two or more harmful factors, laborers