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。
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.
方法：数字化计算机控制体层摄影测量技术被用来确定呼吸消化道起始端鼻腔和口腔之间的解剖长度差异。
Methods: Digital computerized tomography measurement techniques were used to determine the difference in length between the nasal and oral aerodigestive tracts.
提高起始反应温度使催化剂床层温度整体过高导致飞温。
提高起始反应温度使催化剂床层温度整体过高导致飞温。
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