extremely low frequency

Extremely low dissipation factor, high stability. Used in TV gathering focus, oscillation frequency and timer circuits.

低损耗角正切, 高稳定的性能. 适用于电视聚焦, 振荡,定时回路.

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.

When the geosound is propagating in the stratum, the low frequency part of it propagates far in the solid dielectric, while the high frequency part is attenuated so fatly that the signal strength the detector detected is small and extremely weak.

地声在地层中传播时，低频率部分在固体介质中传播较远，而高频部分的衰耗很大，而且探测器接受到的信号强度很小，极其的微弱。

Localization technique of pipeline detecting based on extremely low frequency electromagnetic wave

基于极低频电磁波的管道检测定位技术位置检测器位置传感器

Objective To explore the relationship between extremely low frequency ( ELF ) magnetic fields and carcinogenesis.

目的　探讨极低频 ( ELF ) 磁场可能存在的促癌或协同促癌作用.

The biological effect of extremely low frequency ( ELF ) electromagnetic field on human body is a question in dispute.

极低频 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.