Abstract: the selection of so-called pump calculation is actually estimation (many formula itself is estimate of the estimated the careful points), some consideration of your overall content is accurate calculation. Include water pump selection index, the water pump head, frozen water pump simple estimation method of head practical estimation method, the water pump head design, etc.

- - - - water pump selection index--

The so-called water pump, the selection of calculation is actually estimation (many formula itself is estimate of the estimated the careful points), some consideration of your overall content is accurate calculation.
……
摘要：所謂水泵的選取計(jì)算其實(shí)就是估算（很多計(jì)算公式本身就是估算的），估算分的細(xì)致些考慮的內(nèi)容全面些就是精確的計(jì)算。包括水泵選型索引，水泵揚(yáng)程簡易估算法，冷凍水泵揚(yáng)程實(shí)用估算方法，水泵揚(yáng)程設(shè)計(jì)等。
－－－－－水泵選型索引－－－－－
　　所謂水泵的選取計(jì)算其實(shí)就是估算（很多計(jì)算公式本身就是估算的），估算分的細(xì)致些考慮的內(nèi)容全面些就是精確的計(jì)算。
……