Occupational Safety & Health Administration (US government)职业安全与卫生管理局(美国政府) Occupational Safety and Health Administration职业安全与卫生管理局 occupational safety & health administration职业安全与卫生署 Occupational Safety and Health Act职业安全与卫生法 Occupational Safety and Health Act of 1970职业安全及健康行为的 On-Site Hazard Analysis现场风险分析 Operation & Support Hazard Analysis操作和支持的危害分析 Occasional Safe and Health Association偶尔的安全及健康协会