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| mean lifetime | |||
| average life; ML (mean life) | |||
| average service life | |||
mean life; mean life (Математическое ожидание ресурса  cntd.ru); mean useful life (Математическое ожидание ресурса cntd.ru) | |||
|
средний ресурс : 14 phrases in 5 subjects |
| Aviation | 2 |
| Oil / petroleum | 3 |
| Pumps | 1 |
| Quality control and standards | 3 |
| Technology | 5 |