Objective: To study the sleep state and relative factors of trainman on Qinghai-Tibet railway passenger train and to protect trainmans health by presenting reasonable measures.
目的调查高原铁路旅客列车乘务人员睡眠状况，并对其相关因素进行分析，以提出合理措施保障乘务员身体健康。
Objective: To study the sleep state and relative factors of trainman on Qinghai-Tibet railway passenger train and to protect trainmans health by presenting reasonable measures.
目的调查高原铁路旅客列车乘务人员睡眠状况，并对其相关因素进行分析，以提出合理措施保障乘务员身体健康。
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