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| mean time to first failure | |||
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平均首次故障时间 : 17 phrases in 9 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 2 |
| Business | 1 |
| Electric machinery | 1 |
| Electronics | 5 |
| General | 2 |
| Information technology | 1 |
| Space | 3 |
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