White alphabet letter in word PDE (abbreviation of permitted daily exposure, partial differential equation or personal development education) on black

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White alphabet letter in word PDE (abbreviation of permitted daily exposure, partial differential equation or personal development education) on black pegboard background

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Size: 5978px × 3985px
Photo credit: © Thanee Hengpattanapong / Alamy / Afripics
License: Royalty Free
Model Released: No

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