压力差（pressuredifference），建筑学上指外窗室内外表面所受到的空气压力的差值。当室外表面空气压力大于室内表面时，压力差定为正值；反之为定负值。压力单位以帕（PA）表示。也泛指压力差就是物体两侧所受压力的差值。
压力差 [力] Pressure difference ; difference in pressure ; pressure differential ; delivery head
血管腔内与腔外压力差 Palv-Pc alveolar pressure-capillary pressure ; capillary pressure ; Palv-Pc
压力差动阀 Pressure differential valve ; Pressure plate
压力差示扫描量热法 PDSC
总压力差 [力] total pressure difference
钻-悬循环压力差 on-off bottom pressure-drop
最大开阀压力差 MOPD
转换压力差 switching pressure difference
低速压力差 underspeed pressure differential
支管压力差传感器 MANIFORD DIFFERENTIAL PRESSURE SENSOR
In thecombustion chamber, because the transmission speed of ignition fuel gas between in theinner hole and ring-like blast tube is different, the pressure difference between the holeand the ring-like channel may cause the engine work to be unusual.
在燃烧室内，由于点火燃气在内孔和装药与壁面之间的环形燃气通道内传递速度不同，内孔和环形通道之间的压力差有可能使得发动机工作异常。
参考来源 - 固体火箭发动机点火过程特性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
由于压力差引起的气体或液体流称为滞流。
Flow of gas or liquid due to a pressure difference is called viscous flow.
在像这样的事件中，吸力源于机舱环境与外部环境的压力差。
In events like these, the sucking force originates from a difference in pressure between the cabin environment and the outdoor one.
为此，必须浪费大量能源以克服压力差产生的拉力。
The combination of low pressure on one side and high pressure on the other creates a drag force that must be overcome — a significant waste of energy.
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