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• PM10: Dust in the air with a diameter of 10 ㎛ or less
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• PM2.5: Dust in the air with a diameter of 2.5
㎛ or less
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• PM1.0: Dust in the air with a diameter of 1.0 ㎛ or less
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* Diameter of a human hair: 50 to 70 ㎛
