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but everything you I need to know remember is in the cover illustration.
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I shouldn't speak for others.
Any reflective sheet material. I've been thinking about buying into a local maker-space to get access to a laser cutter. An interesting experiment would be to spring it to a preferred angle and then see if increasing or decreasing the outer radius is called for.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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