File:NIOSH-2011-18+.jpg
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Русский: Рисунок 18 из обзора профзаболеваний шахтёров Coal Mine Dust Exposures and Associated Health Outcomes. Средняя концентрация пыли респирабельного кварца, измеренная инспекторами MSHA в период с 1979 по 2008г в местах добычи открытым и подземным способом. Видно небольшое снижение концентрации, особенно при добыче открытым способом. Источник (MSHA coal mine inspector and mine operator dust data). English: Figure 18. Respirable quartz dust: Geometric mean exposures by type of coal mine (operator and inspector data combined). [MSHA coal mine inspector and mine operator dust data]. |
| Date | |
| Source | Coal Mine Dust Exposures and Associated Health Outcomes. A Review of Information Published Since 1995 |
| Author | Michael Attfield et al (NIOSH, USA) |
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This image is a work of the National Institute for Occupational Safety and Health, part of the Centers for Disease Control and Prevention in the United States Department of Health and Human Services, taken or made as part of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.
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