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| English | Russian |
| hours in operation | время наработки (Forward Speed, Engine RPM, up to 2 Shaft Speed Inputs. (depending on the particular installation), and Engine Hours in operation. Alexander Demidov) |
| hours in operation | часы наработки (Typically, this type of engine is overhauled after 17000 hours in operation. Alexander Demidov) |
| hours of operation | режим работы (rechnik) |
| hours of operation | график работы (rechnik) |
| hours of operation | часы наработки (Alexander Demidov) |
| operation hours | режим работы (MichaelBurov) |