所有的飞机都会产生两个气体圆锥，一个在头部，一个在尾部。
All aircraft generate two cones, at the nose and at the tail.
另外，在飞机降落过程中，富氮气体还可用于。
In addition, the nitrogen rich gas is used for fuel tank pressurization during descent.
另外，在飞机降落过程中，富氮气体还可用于。
In addition, the nitrogen rich gas is used for fuel tank pressurization during descent.
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