black abacus icon isolated white background traditional counting frame education sign mathematics school circle |
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| navigate by keyword : abacus education wooden mathematics calculator tool traditional counting frame count vector icon isolated circle button white black grey background wood object business flat accounting math finance retro calculation old school subtraction antique learning vintage arithmetic mathematical ancient bead number concept equipment symbol financial work row chinese economy obsolete calculate beads |
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| Black Abacus icon isolated on white background. Traditional counting frame. Education sign. Mathematics school. Circle button. Vector. |
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