File:Casio fx-550S.png: Difference between revisions

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184 bytes added ,  03:25, 31 March 2022
Casio fx-550S scientific calculator, circa ~1986 Back reflector and polarizer were replaced with substitute due to vinegar syndrome.
(Casio fx-550S scientific calculator, circa ~1986 Back reflector and polarizer were replaced with substitute due to vinegar syndrome.)
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