Professional⦁Integrity⦁Quality
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J04-020
簡介: 教具設備-儀器1.木製球箱,活動式插梢,九個溝槽2.約500個球體,從8數的釘子空間落下,可作球與球間約分布觀察實驗 3.尺寸:45x29x15cm
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