The condensability of liquid,the Westphal's effect and the continuous flow condition are not only comprehensively considered,but also the dynamic property of the ball valve being established.

结合现场,据直线电机采油泵运动特性,综合考虑了液体的可压缩性、魏氏效应、液体连续流动件和球阀的动力特性,建立了直线电机采油泵球阀运动规律的精确运动微分方程。

In the esophagus, the mucosa collapses against the distal end of the endotracheal tube, thereby limiting the ability to fully pull back on a syringe or for a flexible compressed bulb to reexpand.

道，靠近气管导管远端的粘膜溃烂，因此限制了注射器回抽的能力或弹性可压缩容器的膨胀性。