The pressure value is relatively fixed, using pressure differential allows blood to flow.
这种压力值相对比较固定，利用压力差使血液向上回流。
Based on a s equation, a new expression was derived for pressure drop in fixed bed with gaseous flow.
本文在a—s方程的基础上推导出气体流经固定床时的压降表达式。
Capacitive pressure difference sensor is fixed in the center of the tube and connected with the pulse width modulation circuit so that capacitive flow transducer is made up.
把电容式差压传感器固定在管道中央，并配接脉冲调宽电路，即构成电容式流速变送器。
When the regulation is performed by variable flow rate, there exist two operation regulation modes with fixed zero pressure difference and variable zero pressure difference.
采用变流量调节时，存在定零压差点和变零压差点两种运行调节方式。
Several flow guiders are fixed in between the frame base and the frame. The flow guiders have the first and the second curve surfaces to largely decrease noise and increase wind pressure.
以及多个导流片，设置于该基座与该外框之间，其中该导流片具有一第一曲面和一第二曲面，以大幅降低扰流噪音并可提高风压。
Mold Flow Analysis, Temperature Analysis, Fill Analysis, Pressure Analysis, Buckling Deformation Analysis, Structure Review, Parting Line, Fixed Mold, Moving Mold, Water Circuit.
模流分析、温度分析、填充分析、压力分析、翘曲变形分析、结构评审（初审、定型评审、终审）、分型线结构评审、定模结构评审、动模结构评审、水路分布评审。
Mold Flow Analysis, Temperature Analysis, Fill Analysis, Pressure Analysis, Buckling Deformation Analysis, Structure Review, Parting Line, Fixed Mold, Moving Mold, Water Circuit.
模流分析、温度分析、填充分析、压力分析、翘曲变形分析、结构评审（初审、定型评审、终审）、分型线结构评审、定模结构评审、动模结构评审、水路分布评审。
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