green line abacus icon isolated seamless pattern blue background traditional counting frame education sign |
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| navigate by keyword : abacus education wooden mathematics calculator tool traditional counting frame count vector icon isolated seamless pattern line linear contour outline art lineart 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 |
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| Green line Abacus icon isolated seamless pattern on blue background. Traditional counting frame. Education sign. Mathematics school. Vector. |
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