دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: (NIOSH) an organisation established by the OSH Act within the Department of Health, Education and Welfare to develop and establish recommended occupational safety and health standards and to conduct research. The OSH Act requires NIOSH to publish an annual listing of all known toxic substances and the concentrations at which such toxicity is known to occur.