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Experiments proved that ，with prolonged air exposure,， the outlet of drinking fountain will produce a lot of bacteria,which is ingested through drinking contaminated water.
Paucibacillary Switch is not only a drinking fountain switch, but it also is a plastic cover of the outlet.With the protection of the Paucibacillary Switch,germs of the outlets has declined.With it you can drink cleaner water.
JianJian Li XiaFei Ding Hao Hu Jiang Wu