Youtube activity of "Lepi Doptera" (@lepidoptera9337) on "Free Documentary - Engineering" channel.
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UClZ7LBAjDBJj88BrvyYBqAA
Commenter youtube id
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Lepi Doptera
Commenter name
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@lepidoptera9337
Commenter name id
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"Mechanical Batteries: The Future of Energy Storage? | FD Engineering"
Comments by video
"Planes of the Future: The End of the Jet Age? | FD Engineering"