旋启式止回阀压降最小，能够完全自动关闭，即在介质流动停止、重力和介质倒流的状态下自动关闭阀门。
Swing-type check off er the least pressure drop and offer simple automatic closure; when fluid flow stops gravity and flow reversal closes valve.
压降是超重力旋转床流体力学的重要特征之一。
The pressure drop is one of the most important characteristics in hydrodynamics of high-gravity rotating bed.
盆地流体的驱动机制包括压实驱动、重力驱动和密度(热对流)驱动三种机制，其基本特征及岩石学记录各有不同。
The drive mechanism includes three types: compaction drive, gravity drive and density (heat convection) drive. Their foundational features and lithological information are very different.
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