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"2 "s'il vous plaît, mes amis, la pompe à vide avec une vide deure - -00009 - -0009 - 000 peut-elle aspir l'eau à quelle qu hauteurs?
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本帖最后由 symc 于 2018-8-29 15:32 编辑 :funk:不流动也能产生管阻?……提升的高度,和提到多高流动是不同的是吧:L实际的高度低,是因为要考虑介质分压力……而上式没有考虑分压力!
首先与弯头,管内壁情况有关液就是阻力,其次是和地方大气压有关系。但估算的话可以按照9米*80%=7.2米高度考虑