If there is a fire in the book archives, the most worrying thing is the damage to the archives books after the fighting. Whether it is dry powder or hose, when it is finished, paper books and files will be finished. The carbon dioxide fire extinguisher sprays high-pressure and low-temperature carbon dioxide gas to extinguish the fire through ultra-low temperature and suffocation. The sprayed gas will not cause any pollution to books and papers after volatilization, which can protect books and documents to the maximum extent.
However, special reminder: the air temperature sprayed by carbon dioxide fire extinguisher is extremely low, so it must not be sprayed on human body, otherwise it will cause severe frostbite.