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油膜实验器
Oilfilm experimental apparatns
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声传播演示器
Sound propagating demonstrator
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物体浮沉条件演示器
Demonstrator of body's float-sink condition
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二维空间-时间描迹仪
Two-dimension space-time tracer
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牛顿第二定律演示器
The second law of Newton demonstration apparatus
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传感器应用实验器
Sensor's applied exper imental apparatus
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电学元件黑箱
Electric element black box
价格：￥0.00
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初中科学教学仪器配备标准
Equipping standard of education equipment for science in junior middle school
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初中理科教学仪器配备标准
Equipping standard of education equipment for science faculty in junior middle school
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中小学理科实验室装备规范
Standard for Science Lab Equipment in Primary & Secondary Schools
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