It is a section of the electromagnetic frequency scale, a lode of natural channels used by cellphones.

那不过是手机用到的一段段的电磁波段，一层层的自然频谱。

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Overall use of the electromagnetic frequency or speed control, easy operation, performance and stability.

整机采用变频或电磁调速控制，操作方便，性能稳定。

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The surface properties, inner cracks of billets and the effect of electromagnetic frequency and intensity on as-cast microstructures were investigated.

研究了铸锭表面质量和内裂纹发生情况，考察了电磁场频率和强度对铸态组织的影响。

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Agarwal is in the early stages of further research that can model the human body's role in protecting from radio-frequency electromagnetic waves emitted from cell phones.

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In 1997 the National Research Council issued a major report on the health effects of exposure to power frequency electromagnetic fields (EMF), such as those due to electric power lines.

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