emergency oxygen造句

• Emergency oxygen apparatus
  应急供氧装置
• It is not clear that how different enriched oxygen gas protects aircrew and passenger during emergency oxygen supply , especially , under the condition of passenger ' s mask not hermetic in 12 000m high altitude , and whether molecular sieve oxygen generation system ( msogs ) can vi be used above 8 500m . these problems are all need molecular biological proof
  在现代航空飞行员和乘客的防护问题上，高空应急供氧时间内不同供氧水平对机体的影响尚不清楚，如12000m高度旅客面第四军医大学硕士学位论文罩不气密时供氧防护效果，以及采用分于筛供氧能否提高适用高度等问题，急需从分子生物学水平提供理论参考。