In typical R-L-C resonance circuit, the 555-time-circuit and mercury relay are used as control unit. A damped sinusoid source is designed. It has been proved that the source satisfies our request.

在典型的R L C振荡放电电路中，引入5 5 5时基电路和水银继电器作为控制电路，设计了阻尼正弦瞬变信号发生器。

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The corresponding 13 C NMR resonance peaks are the major basis for the differentiation between treated amber and treated resin.

与之对应的13 C NMR共振谱峰是判断处理琥珀或处理树脂的重要依据。

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The impedance formula of RL-C parallel resonance circuit is deduced theoretically, and some properties of resonance characteristic curve are analysed.

从理论上导出了RL - C并联谐振电路的阻抗公式，由此分析谐振特性曲线性质，并得出文献中引用的RL - C谐振特性曲线成立的充分条件。

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