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Field guide. Sides: above|below|in for HP, front|behind|in for VP. Lines given: TL theta phi alpha beta d fv tv, plus traces. Planes: shape size size2 ref rest{on,elem} theta third{feature,angle,kind}. Solids: solid sides base axis ref rest angle|baseAngle third{angle,kind} where rest is base_edge base_corner face slant_edge generator apex lateral_edge.
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