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内聚力演示器
Molecule force demonstrator
价格:¥0.00
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教学用滑轮
Pulley for teaching
价格:¥0.00
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U形管式微小压强计
Toothful piezometer U-Tube
价格:¥0.00
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手摇离心转台
Hand-driven centrifugal rotating device
价格:¥0.00
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摩擦计
Friction experiment apparatus
价格:¥0.00
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螺旋弹簧
Coi l spr i ngs
价格:¥0.00
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离心水泵模型
Centrifugal pumps mode l
价格:¥0.00
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离心轨道
Centrifugal track
价格:¥0.00
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浮力原理演示器
Buoyancy principle demonstrator
价格:¥0.00
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发音齿轮
Savarts toothed wheels
价格:¥0.00
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