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Continue to ChatInvention in the Corona era: The country's first battery operated mask made in Mumbai, the life of a mask is 6 to 8 months; The virus becomes dead as soon as it comes in contact with it. https://gyan24hrs.com/invention-in-the-corona-era-the-countrys-first-battery-operated-mask-made-in-mumbai-the-life-of-a-mask-is-6-to-8-months-the-virus-becomes-dead-as-soon-as-it-comes-in-contact-with-it/