Reverse beat is a few episodes of medical equipment

Reverse shooting is a Class II medical device. According to the query relevant public information, the first class medical devices are some surgical instruments (non-sterile), medical class magnifying glasses, medical class examination gloves, etc., the second class medical devices are inverted mirrors, medical class masks, some surgical instruments (sterilized), some medical class equipment, inversion beat, etc., the third class medical devices implantable devices, etc.. Inversion beat is used to change the modulating stimulus, positive mirror to reduce the modulating stimulus, negative mirror to increase the modulating stimulus, the collection stimulus remains unchanged, and thus the modulating collection change is accompanied by an equal magnitude but opposite direction of fusional aggregation and dispersion change.