black line abacus icon isolated white background traditional counting frame education sign mathematics school set |
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| navigate by keyword : abacus education wooden mathematics calculator tool traditional counting frame count vector icon isolated square set button color colorful white black 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 |
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| Black line Abacus icon isolated on white background. Traditional counting frame. Education sign. Mathematics school. Set icons in color square buttons. Vector. |
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