This German father invented a vacuum to expel COVID-19 from classrooms

Name: This German father invented a vacuum to expel COVID-19 from classrooms
Uploaded: 2021-03-22T15:39:19Z
Duration: 58 s
Description: It’s installed in 40 classrooms in his hometown of Mainz

It’s installed in 40 classrooms in his hometown of Mainz

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This German father invented a vacuum to expel COVID-19 from classrooms

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