1. Classification by type of antishock:Equipment powered by internal power supply. 2. Classification according to the degree of antielectricshock: it belongs to type B application part. 3. Classification according to the protection degree of harm fulliquid inlet:generalequipment. 4. Classification according tothe safety degree of use in the case of mixture of flammable anesthetic gas and air or mixture of oxygen or nitrous oxide:it belongs to the equipment not suitable for use in the place with flammable anesthetic gas.