Understanding from firefighters is 400 words.

When we got off the bus, the firemen's uncles lined up neatly at the door to meet us! First of all, the fireman's uncle told us some common sense about fire prevention. For example, after a fire burns, it can be controlled within 5 minutes. If it reaches the peak after more than 5 minutes, we need their professionally trained firefighters to put out the fire. After talking about fire prevention knowledge, the fireman's uncle showed us fire-fighting equipment, including life detectors, toothless saws, hydraulic tongs, fire suits, etc ... They also showed us a stunt performance on the spot-they put four light bulbs, each with a wire, and sawed off the wire with a toothless saw; You also need to clamp the ping-pong ball with hydraulic tongs and put it on the beer bottle. It is said that table tennis will be squashed if it is too strong, but it can't be clamped if it is too weak. Therefore, the intensity must be controlled. It can be seen how hard the firefighters' uncles usually practice! After visiting the fire fighting equipment, I visited the ladder truck, fire truck and water sprayer. The ladder truck is used to rescue people trapped in high places, the fire truck is used to help firefighters put out the fire, and the water sprayer is used to spray water to high places. After visiting the fire truck, we visited the dormitory of fire officers and soldiers, whose quilts were like tofu blocks. Then, we came to the honor room, where the fire officers and soldiers awarded prizes for every act of bravely entering the fire. These awards include the blood and sweat of many fire officers and soldiers, and I suddenly paid tribute to them. At the end of the activity, I gave my uncle a painting with deep respect, depicting the scene of fire fighters going through fire and water and being reborn from the fire. Uncle fireman smiled and accepted my blessing.

Firefighters are heroes who are not afraid of fire! We should pay tribute to them!