Check all supply lines and filters for obstruction and ensure that you have an adequate supply of water to the inlet of the pump.

检查所有供应管线和过滤器是否有故障，确保有足够的水供给到水泵进口。

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The signal processing problems in the receiving part of multi-waveform radar using SAW bandpass filters and SAW dispersive delay lines are discussed.

讨论波形捷变雷达接收部分使用声表面波带通滤波器和声表面波色散延迟线进行信号处理的有关问题。

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The design principle is analysed for band-pass filters using three parallel coupled-lines and the related design curves are given.

本文分析了三线平行耦合线带通滤波器的设计原理，给出了有关设计曲线。

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And it must run on diesel five minutes before shutting down to purge the system of grease, which can clog fuel lines, filters and injectors.

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The rooms are designed like upgraded 1950s bomb shelters, with air filters to screen out biological agents, dedicated phone lines, bathrooms and closed-circuit TV systems.

FORBES: Magazine Article