gradient tube method 梯度管法
density gradient tube 密度梯度管
density-gradient tube 梯度管 ; 密度
gradient tube density determination 梯度管密度测定
high-gradient accelerating tube [核] 高梯度加速管
alternating gradient accelerating tube 变梯度加速管
double-gradient reaction tube 双梯度反应管
If there is a bulk mixing of the layers of gas in the tube by mechanical stirring or because of a density gradient, mass transfer occurs primarily by the mechanism of forced or natural convection.
如果是受到机械式的搅拌或者是密度梯度发生了变化而使得管中有大量的分层的气体，那么传递就主要通过强制对流或自然对流而发生。
Interference with a new coating process, than the average gradient film better performance vacuum tube collector.
采用全新干涉镀膜工艺，比普通渐变膜真空管集热性能更好。
The effects on the underwater sound attenuation by the thickness and concentration gradient of polymers were measured in a sound tube at different frequency during the polymers dissolution process.
文中详细研究了梯度高分子溶液在不同频率下，聚合物厚度及梯度结构的变化对反射声衰减效果的影响。
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