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| fail-safe-system | |||
| 失效系统: 26 phrases in 12 subjects |
| Air defense | 1 |
| Automobiles | 6 |
| Aviation | 2 |
| Communications | 2 |
| Computers | 2 |
| Electronics | 2 |
| Metallurgy | 1 |
| Mining | 1 |
| Refrigeration | 1 |
| Reliability | 2 |
| Technology | 2 |
| Telecommunications | 4 |
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