The compressing air input the case of mini polisher, active the powder,forming a fog of powder,Then the powder fog spurt out from the centre pipe of the nozzle of mini polisher. While the water input the mini polisher ,output from the gap between inner pipe and outer pipe of the nozzle.The powder flow and the water flow mix at the outlet of the nozzle,forming a spray,the spray hit the stains on the teeth.
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