This article introduces the factures and demonstration circs of a demonstrator of overweight and zero gravity which shows their data and whose demonstrational effect is very good.
介绍了一例超重失重演示仪的制作及演示情况，该演示仪能具体得到超重失重数值，演示效果好。
System form and demonstration method for a demonstrator of grating spectra are presented.
介绍了光栅光谱演示仪系统的组成及演示方法。
A demonstrator which indicates overweight and weightlessness by luminescent demonstration is introduced. It has good visual effect.
本文介绍了利用发光显示超重、失重演示器的直观性效果好的特点。
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