| Subject | English | Russian |
| gen. | 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) |
| law | hours in operation | рабочие часы (Alexander Demidov) |
| gen. | hours in operation | часы наработки (Typically, this type of engine is overhauled after 17000 hours in operation. Alexander Demidov) |
| logist. | trailer hours in operation | продолжительность эксплуатации оборудования |