Breathing apparati for undergrund use !

This picture shows the underground fire brigade's oxygen apparati.

For underground use the breathing apparati must be built very robust - as you can see they have a metal coat around themselves. If you look at the labyrinth on the next page and imagine you have to climb through there with these machines on your back and 30 degrees Celsius while the way is very foggy, then you can nearly feel the fire brigade's exhaustion after practising what will expect them during an emergency underground. That is the reason why being a member of this brigade is very honorable. But now follow the stations for training with me.