Cart-type carbon dioxide fire extinguishers are generally operated by two people, when using two people together to push or pull fire extinguishers to the burning place, 10 meters from the burner stopped, a person quickly remove the horn and expand the spray hose, grasp the horn of the root of the handle, another person quickly press counterclockwise rotation hand wheel, and open to the maximum position. Fire extinguishing methods are the same as hand-held methods.
Principle: The temperature of combustible materials is rapidly reduced and isolated from air.
Advantages: The fire will not leave any traces of damage to the items, it can be used to extinguish books, files, precious equipment and precision instruments.