BBCTech : Schoolgirl invents low-cost lead detecting device https://t.co/Qa9tHWCCcw (via Twitter https://t.co/8NfQZNWztX) http://pic.twitter.com/XI6Pl3AwG3
— Great Tech (@GreatTechUK) December 4, 2017
from Twitter https://twitter.com/GreatTechUK
December 04, 2017 at 12:23AM
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