What are the 9 safety symbols?

Here are the nine safety symbols or pictograms and what they mean:

• Exploding bomb - explosives
• Flame - flammable 
• Flame over circle - oxidising 
• Corrosion - corrosive
• Skull and Crossbones - acute toxicity
• Environment - hazardous to the environment
• Exclamation mark - health hazard/hazardous to the ozone layer
• Health hazard - serious health hazard
• Gas cylinder - gas under pressure