Slide Rule on a mechanical drawing of a gear box

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Slide Rule on top of a mechanical drawing in a engineering department

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Size: 5083px × 3389px
Photo credit: © boris / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: antique, base, box, calculate, cosine, decade, divide, drawing, engineering, exponent, exponential, gear, log, logarithm, mathematic, mechanical, multiply, number, rule, scale, sin, single, slide