Youtube activity of "Lepi Doptera" (@lepidoptera9337) on "driving 4 answers" 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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"Rotary Valves Make Normal Valves Look Silly - Why Aren't We Using Them?"
Comments by video
"You May Not Like It But this Is What Peak Combustion Technology Looks Like - Rotary Vane Engine"