Explosive atmospheres. Explosion prevention and protection. Basic concepts and methodology|Safety measures, Ionizing radiation, Hazards, Electric current, Fire risks, Risk assessment, Particulate materials, Fire safety, Design, Flame traps, Protected electrical equipment, Lightning, Flames, Marking, Ignition, Explosive atmospheres, Dust, Electromagnetic radiation, High frequencies, Instructions for use, Ignitability, Control equipment, Surfaces, Ventilation, Hazardous areas classification (for electrical equipment), Electric sparks, Electrostatics, Classification systems, Chemical hazards, Ultrasonics, Electrical safety, Gases, Explosions, Hand tools