Confined spaces: avoiding the hazards.
D000062:Accidents, Occupational / Q000517:prevention & control*; D000293:Adolescent; D000328:Adult; D001272:Atmosphere; D005740:Gases; D006801:Humans; D009784:Occupational Diseases / Q000453:epidemiology / Q000517:prevention & control*; D012449:Safety
D005740:Gases