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教学仪器产品图样和技术文件未注公差尺寸的极限偏差
The limit errors without tolerance indication on drawings and technical documents for educational equipment
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教学仪器和教学设备产品型号命名方法
Methods of type designation for producets of teaching instrument and equipment
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感应圈
Induction coil
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电磁振荡演示仪
Demonstrator of electromagnetic oscillation
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电子束演示器技术条件
Specification of demonstrator for electron - beam
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铜的电化当量实验器
Copper electrochemical equivalent tester
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楞次定律演示器技术条件
Specification of demonstrator for Lenz's law
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左右手定则演示器技术条件
Specification of demonstrator for rules of left and right hands
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蹄形电磁铁技术条件
U-shaped electric magnel technical requirments
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磁针
Magnetic needle
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