 |
| |||
| remain functional (Alexander Demidov); remain active (YGA) | |||
| hold down | |||
| survive; ensure safe operation (LyuFi) | |||
| сохранять работоспособность: 12 phrases in 7 subjects |
| Astronautics | 1 |
| Aviation | 1 |
| Energy industry | 3 |
| Makarov | 3 |
| Nanotechnology | 1 |
| Oil / petroleum | 2 |
| Quality control and standards | 1 |