File:Classroom ventilation.png

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Original file ‎(1,280 × 1,160 pixels, file size: 286 KB, MIME type: image/png)

Summary

Anti-Covid air technology in schools

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current13:41, 25 October 2021Thumbnail for version as of 13:41, 25 October 20211,280 × 1,160 (286 KB)UKpeacelibertyfreedom (talk | contribs)Anti-Covid air technology in schools
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