every three to 24 hours gen.

[adelaida]

Проект реконструкции произв. линии.

Nitrogen & Compressed air
consumption
To secure the Ex-Zones with nitrogen application, the nitrogen flow must be monitored at any time.
Depending on the reaction time the reactors are emptied every three to 24 hours, so that nitrogen must be in an amount of approximately:

Не совсем поняла фразу "every three to 24 hours"

Спасибо.

[natasha396]

с промежутком 3-24 часа

[adelaida]

Спасибо, похоже на то..