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Dans le tuyau entre la cuve et le pompier,,启动泵后,该段管道是正压还是负压

2017-09-16View Original

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Dans le tuyau entre la cuve et le pompier,启动泵后,该段管道是正压还是负压,求大神们帮助
Reply #22017-09-20
Le tuyau entre la cuve et le pompier est-il sous pressionionione还是还是抽吸状态取决于你是向储油槽内注油还是从储油槽内排油,如果是注油,则该段管道是正压,如果是排油,则该段管道是负压

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