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| Russian | English |
| напор при максимальной подаче нормальной рабочей зоны | head at the runout flow (petr1k) |
| полный рабочий напор | total head of a pump |
| рабочий напор | operating head of a pump (a pump’s flow-rate at varying heights; the amount of water a pump will produce falls as the head increases; the higher the pump has to push the water, the lower the flow-rate at the outlet) |