explore geometric area calculation formula primary school mathematics teaching demonstration science and education instrument_青华科教仪器有限公司

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explore geometric area calculation formula primary school mathematics teaching demonstration science and education instrument

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explore geometric area calculation formula primary school mathematics teaching demonstration science and education instrument

探索几何图形面积计算公式小学数学教学演示科教仪器

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Exchage Rate 1 CNY ≈ 0.1419 USD
Item No. 青华20534
Stock num 999 piece

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