Soft soil can filter high frequency signals, but can amplify low frequency signals.

软土对高频地微动信号有滤波作用，对低频信号起放大作用，而硬土层则相反。

youdao

Drawing 1 is bar chart of electro filter high-low voltage electrical control system.

图1是除尘器高低压电气控制系统方框图。

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This paper designs a digital FIR filter architecture, which can be used to filter high-speed differential signals.

设计了一种对高速差分信号进行FIR滤波的滤波器结构。

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That allows the company to act like a filter for high-tech clients like Motorola, Inc.

FORBES: The unsentimental publisher

As the technology becomes more widely available it will filter down to High Street shops, she adds.

BBC: Shopping: The new tactics to get you spending

The new Louver filter and new high performance panel result in improved external light shading, improved clarity and improved light transmittance.

ENGADGET: Panasonic unveils Infinite Black Ultra Panel plasmas for 2012 (eyes-on)