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我们于1984年按照中美肺功能研究协作方案,从广州造船厂35～54岁的人群中随机抽取男工468人,女工530人,使用美方统一提供的Collins Stead-
In 1984, according to the US-China Collaborative Research Program on Lung Function, we randomly selected 468 male workers and 530 female workers from the 35 to 54-year-old population of the Guangzhou Shipyard, using the Collins Stead- provided by the United States.