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оставаться в эксплуатации (Systems in use tend to remain in use; the more critical they are, the more inertia they have.  medium.com Alex_Odeychuk) | |||
| remain in use: 1 phrase in 1 subject |
| Firefighting and fire-control systems | 1 |
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| оставаться в эксплуатации (Systems in use tend to remain in use; the more critical they are, the more inertia they have. medium.com Alex_Odeychuk) | |||
| remain in use: 1 phrase in 1 subject |
| Firefighting and fire-control systems | 1 |