本文较系统地介绍了液压元件试验台CAT系统的硬件和软件组成。
The hardware and software of CAT system for hydraulic devices are systematically presented in the paper.
溢流阀和管道都是液压系统的重要元件，而溢流阀、管道和定量泵组成的系统又是液压系统的基本回路。
The relief valve and the pipeline are both important components of the hydraulic system, and that system including of relief valve and pipeline and constant pump is the basic loop of it.
设计缺陷和液压系统元件的老化是导致龙门铣床出现故障的主要原因。
Design defects and hydraulic system elements aging are the main causes of the gantry milling machine's fault.
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