slide rule on a green background
slide rule on a green background
Size: 4466px × 2973px
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