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Terms for subject Aviation containing 上 层 | all forms | in specified order only
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上层客舱upper deck passenger compartment
上层建筑前后均装有舰空导弹的军舰doubled-headed warship
上层掩护top cover
上层航线upper air route
上层舱地板upper deck
大气中间层的上层mesodecline
云层以上above clouds
在跑道上覆盖灭火泡沫层foam the runway
臭氧层上限ozonopause