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.
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.
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