By varying VR1 you can set how fast the siren changes from high freq. to low Fred.

通过改变VR 1你可以设置多快从高频率警报的变化。低频率。

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D1 and VR1 clamp leading-edge voltage spikes caused by transformer leakage inductance.

D1和VR1的钳尖端的电压尖峰惹起的变压器漏电感。

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All these results suggested that VR1 is critical for the expression of inflammation-induced heat hyperalgesia.

这些结果进一步说明VR1在炎症性热痛敏的形成中起着非常重要的作用。

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