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| 应急出口 | |||
| 太平通道 (hatch, 舱口) | |||
| 应急出口救生口; 应急围井 | |||
| 脱险围井【管】 | |||
| 应急通道 | |||
| 应急出口围阱; 应急出口 (围壁); 潜水艇逃生舱; 逃生孔 | |||
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escape trunk : 4 phrases in 3 subjects |
| Economy | 1 |
| Nautical | 2 |
| Technology | 1 |
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