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阐述在人－机－环境系统中人、机器与环境因素三者之间的关系，分析煤矿井下高温环境因素对人产生的影响，得出人体生理所需的适宜温度及人体的可耐限度并用公式说明环境因素对生产系统产生的影响。
The relationship between human, machine and environmental factors in human-machine-environment system is expounded. The influence of high temperature environmental factors on people in coal mine is analyzed, and the appropriate temperature and tolerance limit of human body are obtained. The formula describes the impact of environmental factors on the production system.