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occupational exposure limits
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occupational exposure limits
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工学
职业接触限值
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occupational exposure limits
职业接触限值
劳动者在职业活动过程中长期反复接触,对绝大多数接触者的健康不引起有害作用的容许接触水平。
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socialist theory of journalism with Chinese characteristics
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socialist transformation of the handicraft in China
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