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Proposal for Certification Tests and Standards for Closed-circuit Breathing Apparatus

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, Pittsburgh Research Laboratory, 1999
URL	http://books.google.com.hk/books?id=SXJnHQAACAAJ&hl=&source=gbs_api