April 11, 2020 • 2 mins
National university of Singapore के research के अनुसार , blue led lights में रखे गए food products जल्दी खराब नही होंगे। साथ ही भविष्य में blue led को chemical preservatives के बदले replace किया जा सकता है। Podcast host : Shivam Pandey Email : shivamk9060@gmail.com website : https://goodmorningbihar.blogspot.com
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