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牙科装修负压管要试压吗,试几个压

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牙科装修负压管要试压吗,试几个压

浏览：27次 | 提问时间： 09-04 10:46

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3个答案

本宫乃帅比 09-04 10:47

你那里不是标的是2.6MPA/F.V吗,就是说正压也要承受2.6MPA啊,所以按2.6MPA乘以1.5即可

我想我的世界有陽光 09-04 10:55

负压管道的平均风速应该是sqrt(2h/p)其中h是平均动压,题目中可以设为700Pa;p是空气密度,20c下空气密度可以查表或者算都很好算的。这个速度是平均风速,因为负压管内管壁速度肯定比中心速度慢很多的。不过算风量的话肯定要用平均风速的。

今夜星光灿烂 09-04 11:03

根据50235负压只做两公斤的正压实验可是这条线即有正压又有负压不知道是不是就按正压做。试验压力是设计正压的1.15倍。

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