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Martin Sprocket and Gear, Inc., Fort Worth, Texas

Calvin K. Cook

出版	U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 1996
URL	http://books.google.com.hk/books?id=AOTYAUmA6eEC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN