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Why a police man covers his …

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Why a police man covers his nose when he controling traffic

    • Posted by Chaitali Baravakar 5 years, 6 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Nivedya?? Manoj 5 years, 6 months ago

    A police man always covers his nose with a mask while controlling traffic is to avoid the polluted air or smoke entering the respiratory system smoke may contain harmful dust particles

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