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供氧面罩
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供氧面罩
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oxygen mask
供氧面罩
飞机防护救生系统中,将供氧系统输来的呼吸气体导入人体呼吸器官,并将呼吸器官和周围大气隔开以保持应有的含氧浓度,以及在一定高度以上保持应有呼吸压力的口鼻呼吸器。
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natural cheese
natural circulation
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natural circulation steam generator
natural class
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Natural Color System
natural color system
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natural convection
natural convection heat transfer
natural convection in enclosure
natural convection in infinite space
natural convolutions in cotton fiber
natural cooling of motor
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