日本斥巨资建立发动机模拟高空试验台。
Japan has invested a huge sum on building up a simulated altitude test facility.
本文试验在自由射流风洞中进行，利用空气加热器模拟高空飞行条件。
About the experiment, these experiments were conducted in the free stream wind tunnel, and vitiated air heater was used to simulate the high altitude flow condition.
不太确定会否使用高空模拟室来准备。
Those that are not are certain to use altitude Chambers to prepare.
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