occupational role职业角色occupationaladj.职业的occupational dermatoses of miners矿工职业性皮肤病, 煤矿业皮肤病occupational safety consciousness安全意识Occupational Measurement Squadron专业测量中队occupational distribution pattern职业类别分布occupational qualification system职业资格制度occupational radiation protection职业性辐射防护Occupational health investlgatlon职业卫生调查occupational safety and health law安全生产法Occupational Safety and Health Act职业安全与卫生法Occupational exposure to radiation职业性暴露于射线