vintage wooden abacus in the classroom of a school
Palabras clave
abacus,
calculating,
bead,
arithmetic,
calculating machine,
counting,
count,
ball,
ball,
small,
bead,
wooden,
wood,
vintage,
retro,
antique,
ancient,
old,
50s,
60s,
40s,
line,
horizontal,
line
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