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| English | Russian |
| at the normal operating point | номинальный режим (petr1k) |
| nominal operating point | номинальная рабочая точка (petr1k) |
| operating head of a pump | рабочий напор (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) |
| rated operating condition | номинальный режим работы (petr1k) |
| rated operating conditions | номинальный режим (petr1k) |
| special operating conditions | особые условия эксплуатации (translator911) |
| variable operating conditions | условия эксплуатации переменного характера (leaskmay) |