slide rule on a green background

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Size: 4376px × 2913px
Photo credit: © Laborant / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: algebra, antiques, background, business, calculation, calculations, calculator, closeup, education, engineer, finance, financial, green, logarithm, manual, mathematical, mathematics, retro, rule, school, slide, static, studying, subtraction, tool, traditional, vintage, work