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本文作者选纺织女工323名,平均年龄36(20～48)岁,平均工龄9.7(3～28)年。另选工作和生活环境无噪声污染的售货员296名作对照,平均年
The author selected 323 textile women workers, the average age of 36 (20 to 48) years, the average length of service 9.7 (3 to 28) years. Another 296 salespeople with noise-free work and living environment were selected for comparison, the average year