In worker group of 10 years senonity . The positive rate of Hb reducing(20.4%) was significantly higher than the worker of 1 year senonity (5.3%). W.

 
  • 10年工龄组工人血红蛋白降低的阳性率(20.4%25)显著高于1年工龄组(5.3%25),差异有显著意义;
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