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| |||
| back-up facility; backup facility | |||
| stand-by facility | |||
| standby facility | |||
| alternate facility | |||
| |||
| back-up facility | |||
| 备用设施: 9 phrases in 8 subjects |
| Aviation | 1 |
| Cryptography | 1 |
| Economy | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Pest control | 1 |
| Technology | 2 |
| Water resources | 1 |
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