正常人的肺通气功能在一天24小时内不尽相同，为了了解三班制工人肺通气功能昼夜24小时中的变异情况，我们用峰速仪对某纺织厂纺部车间乙班36名三班制工人进行了每日4次、连续3周的呼气高峰流速值（PEFR）测定，观察了不同时相PEFR的变异情况，并对该班工人在不同班次的PEFR进 Normal lung ventilation function varies within 24 hours a day, in order to understand the three-shift workers in 24 hours of day and night variation of lung ventilation function, we use a sprinkler on a spinning mill workshop B Class 36 The workers carried out four times a day for 3 consecutive weeks of peak expiratory flow value (PEFR) determination, observed at different phases of PEFR variation, and the class workers in different classes of PEFR into