The vibration equation for thin flat plane loudspeaker with single point drive and four corners fixed is deduced and its simple harmonic vibration frequency in this condition is analyzed.
推导了固定四角薄型平板扬声器在单点激励下的振动方程，分析了在受激情况下的简正频率，并由简正频率方程导出其受力方程。
The paste has simple structure and convenient manufacture and solves the problem of quantitative inoculation on a fixed point for the plant disease researches.
它结构简单，制作方便，解决植物病害研究的定点定量接种问题。
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