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Report of Mine Safety and Health Administration Electrical Inspection Retraining Course at National Mine Health and Safety Academy, Beckley, West Virginia, August 21-30, 1979, September 18-27, 1979
James S. HicksCecil E. Lester
出版Department of Labor, Mine Safety and Health Administration, 1980
URLhttp://books.google.com.hk/books?id=1XzlA0DZK7AC&hl=&source=gbs_api
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