This falls in the extremely low frequency (ELF) range which includes frequencies up to 300 Hz.
这种频率属于极低频的频率范围内，通常极低频的频带范围也在300hz以下。
This analytic method is also suitable for the bands of extremely low frequency (ELF) and very high frequency (VHF).
这种分析方法也适用于极低频到甚高频波段。
The biological effect of extremely low frequency (ELF) electromagnetic field on human body is a question in dispute.
低频电磁场是否对人体或生物存在不良影响，一直是学者们争议的课题。
The important frequencies for stimulating tissue repair are all in the biologically important extremely low frequency (ELF) range.
为促进组织修复的重要频率在生物的重要极低频所有(低频)的范围。
Objective To study the effects of extremely low frequency electromagnetic field(ELF EMF) and its combination with lead on the antioxidant system in mouse brain and liver tissues.
目的研究极低频电磁场及其与铅的联合作用对小鼠脑和肝脏抗氧化系统的影响。
The current situation, present questions, future research direction of effects and application of extremely low frequency electromagnetic field on human health are introduced in this paper.
简要介绍了极低频电磁场对人类健康的影响和应用研究的现状、存在问题及未来研究方向。
The extremely low frequency electromagnetic fields (ELFEMF) were very related to humans health and living environment and its biological effects were more and more interested to scientists.
极低频电磁场(ELFEMF)与人类的生存环境及健康密切相关，其生物学效应也倍受关注。
Objectives to investigate intensity of extremely low frequency magnetic field (ELFMF) emitted from cathode-ray tubes (CRT) of monitors in various directions and to find ways to avoid its influence.
目的研究电脑阴极射线管显示器正前方不同距离和不同方位的极低频磁场(ELFMF)强度，就如何减少ELFMF的影响提出初步建议。
This makes achieving negative permeability under extremely low frequency as well as the permeability switching between positive and negative value rapidly through a magnetic field pulse into possible.
这使实现极低频的负磁导率以及通过磁场脉冲实现磁导率在正负之间快速跳变成为可能。
No data relevant to the carcinogenicity of static electric or magnetic fields and extremely low-frequency electric fields in experimental animals were available.
静态电磁场和超低频电场对实验室动物致癌性的相关数据未提供。
There is inadequate evidence in experimental animals for the carcinogenicity of extremely low-frequency magnetic fields.
超低频磁场对实验室动物致癌性证据不足。
There is inadequate evidence in humans for the carcinogenicity of static electric or magnetic fields and extremely low-frequency electric fields.
静态电磁场和超低频电场对人类致癌性证据不足。
In high frequency communication, extremely low SNR communication is an expedient means.
在短波通信中，极低信噪比条件通信是一种应急通信手段。
It can reach control object quickly without vibration, so is extremely suitable for industrial control such as machine tool of low frequency response.
可快速、无振荡抵达控制目标，特别适用于机床等响应速度不高的工业控制。
Extremely low leakage current, standard size. Used in TVs frequency channel conversion or weak signal import loop circuits.
良好的低漏电特性，标准尺寸。适用于电视机频道转换或小信号输入回路。
As far as cased-hole formation resistivity logging, the key problems needed to be solved are detection of ultra-low frequency and extremely weak signals, as well as reduction of strong interferences.
超低频、纳伏级信号的检测以及强干扰的抑制是过套管地层电阻率测井需要解决的关键问题。
Low loss at high frequency, extremely small inherent temperature rise, high reliability.
高频损耗小，内部温升极小，可靠性高。
Extremely low-frequency magnetic fields are possibly carcinogenic to humans (Group 2B).
超低频磁场可能对人类致癌。
Extremely low-frequency magnetic fields are possibly carcinogenic to humans (Group 2B).
超低频磁场可能对人类致癌。
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