The relay valves which are used at the end of long pipelines can quickly fill gas cells with compressed air, for example, in trailer or semitrailer brake systems.

　
英 美
  • 繼動(dòng)閥用于長(cháng)管路的末端，使儲氣筒的壓縮空氣快速充滿(mǎn)制動(dòng)氣室，如在掛車(chē)或半掛車(chē)制動(dòng)系統中。
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