VISIBILITY (DESCRIPTIVE GEOMETRY)
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BTPERSPECTIVE CONSTRUCTIONS + SHADOW THEORY (DESCRIPTIVE GEOMETRY)
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UDC514.182.3*1
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Descriptor GERSICHTBARKEIT (DARSTELLENDE GEOMETRIE)
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Descriptor ENGVISIBILITY (DESCRIPTIVE GEOMETRY)
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Descriptor FREVISIBILITÉ (GÉOMÉTRIE DESCRIPTIVE)
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Variant GERVISIBILITÄT (DARSTELLENDE GEOMETRIE)
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RTVISION GEOMETRY (COMPUTATIONAL GEOMETRY)