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| 生命保障和环境控制系统 | |||
| 生命保障与环境控制系统 | |||
| 生命保障和环境控制系统 (载人航天器的) | |||
| life support and environmental control system: 6 phrases in 3 subjects |
| Aviation | 1 |
| Earth sciences | 1 |
| Space | 4 |
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