One finger tip vibrating masseur and one low-frequency current treating circuit to act on the insomnia acupoints and finger tip may be increased to raise the hypnogenesis effect.

本发明的催眠仪可辅助增加一组对指尖的振动按摩器和一组对失眠穴及指尖施加低频电流的电疗电路，以提高催眠效果。

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The current measurement and control system in a Low-frequency Magnetic Field is a comprehensive system of hardware and software, including two parts: current measurement and computer control.

低频电磁场电流测控系统包括电流测试和输出控制两个部分，由软件和硬件相互配合组成一个完整的计算机控制系统。

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Shielding may be essential in a switching system if a mixture of low current, high voltage, and high frequency signals are present.

如果切换系统中会混合出现小电流、高电压和高频信号，屏蔽则非常关键。

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Although they have not been found to cause any harm, the cables on conventional pylons, which transmit a three-phase alternating current, generate a strong electric field and a continuous buzz of low-frequency radio waves.

ECONOMIST: Monitor