在对空压机要求不高的情况下，一般采用调制式控制，即通过控制压缩机吸入空气的量来保证系统所需要的空气压力。
In the air compressor demand is not high, the general use of the modulation control, that is, through the control of air inhaled compressor is to ensure that the system need air pressure.
当吸入压力大于2或3个大气压的纯氧时，可以观察到典型的神经系统症状。
When pure oxygen is inhaled at pressures greater than 2 or 3 atmospheres, a characteristic neurological syndrome can be observed.
随着海拔的增加(高于海平面)，大气压力减小，导致吸入柴油机气缸内的空气量减少。
With the increase of altitude (above sea level), atmospheric pressure decreases, which leads to a reduction of the air amount inhaled into the cylinder of diesel engines.
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