求翻译：这样较少的供气量就能满足相同的制冷效果，发动机油耗少，经济性好。但在飞机静止在地面或低速运动时，热交换器周围缺乏冲压空是什么意思？

Less the amount of gas that can meet the same cooling effect, the engine fuel consumption and less, the economy is good. But the plane still on the ground or low-speed movement, the lack of press surrounding air heat exchanger

This is a relatively small number of gas supply volume will be able to meet the same effect of refrigeration, the engine oil consumption and economic good. However, when the aircraft on the ground or stationary at low speed movement, heat exchangers, lack around punching air

正在翻译，请等待...

So less amount of steam supply can meet the same performance, engine oil consumption few and economic good. But in the plane standing still in the ground or in low speed movement, lacks punch around the heat exchanger

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