With increase of bed height, air pressure and power consumption rise, expansion ratio of the bed decreases, but the density stability and critical fluidized velocity of the bed are hardly changed.
随着床层高度的增加，所需风压及功率增大，膨胀率有所降低，而床层密度的稳定性和起始流化气速几乎不变。
2
Stability is the main theme of the bedroom feng shui, the bed is against the wall is stable.
稳定是卧室风水的主调，床头靠墙就是求得稳定。
3
The element sulfur as a main product prevented acidification of the biological fixed bed, which maintained the stability of the operation.