The efficiencies of traps increase with height above the bed.
集沙效率随着距床面高度的增加而急剧增高。
Within the tree height, there was a trend for pollen density to increase with height.
在树高范围内,花粉浓度有由下至上增加的趋势;
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。
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