Expensive medical equipment

Test center: Principles and methods of several commonly used fire extinguishers Topics: Chemical and life analysis: According to the fire extinguishing principle, a carbon dioxide fire extinguisher compresses liquid carbon dioxide into a small steel cylinder when pressurized, and then ejects it for analysis and answer. When the carbon dioxide fire extinguisher is pressurized, the liquid carbon dioxide is compressed into a small steel cylinder. When the carbon dioxide fire extinguisher is ejected from the storage container, it will quickly vaporize into gas, absorbing part of the heat from the surrounding and playing a cooling role. Carbon dioxide gas can exclude air and surround the surface of burning objects or distribute in a relatively closed space, reducing the oxygen concentration around combustible substances or in a protective space, causing suffocation and extinguishing fire. Therefore, it is not difficult to comment on C: understanding the fire extinguishing principle of carbon dioxide fire extinguisher is the key to correctly answer this question.