Circular slide rules – Artofit

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Circular Slide Rules
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Slide Rules
Geometrical Constructionz
Design: Wheels
Aristo Slide Rules

SLIDE RULES
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Paper Engineering
Circular Slide Rule Calculators | Wheel Chart Calculators | Datalizer

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Cold War Calculators – Calculating

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lp trophy
Retro pixel art
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2013 Unconventional Calendar - Trecena - Ryan Claybaugh

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Circular Slide Rules

Slide Rules