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教学测力计
Teaching force gauge
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小学电流实验盒技术条件
Specification for electric current experimental box of primary school
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小学静电实验盒技术条件
Specification for electrostatic experimental box of primary school
价格：￥0.00
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小学磁铁性质实验盒技术条件
Specification for magnet experimental box of primary school
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小学物体沉浮实验盒技术条件
Specification for floating experimental box of primary school
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小学简单机械实验盒技术条件
Specification for mechanical experimental box of primary school
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教学用闸刀开关
Teaching knifebreak switch
价格：￥0.00
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电磁波发送接收演示器技术条件
Specification for transmitting and receiving of electromagnetic wave demonstrator
价格：￥0.00
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钟面模型
The model of clock
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