在液体的流动空间任意画一不属流线的封闭曲线，由这些流线组合的表面称为流管，流管内的流线群称为流束。
n. fillet
misc. stream tube
单流束水表 single-jet water meter
尾流束 outflow jet
排出流束 outflow jet
偏转流束放大器 [机] beam deflection amplifier
反流束容积 regurgitant jet volume ; RJV
动脉瓣彩色反流束容积 regurgitant jet volume
量主动脉瓣反流束容积 regurgitant jet volume ; RJV
射束电流 [电子] beam current
流束效应 streaming effect
流束存在碰撞时，负能性质改变为负耗散性质。
When the stream is collisional, the negative energy nature changes to negative dissipative nature.
彩色多普勒示返流及分流束的面积和周长均增加。
The color Doppler jet area and circumference of all jets were also increased.
观察30例显示血流会聚区（FCR）的偏心性二尖瓣返流患者的返流束形态，发现均为附壁细长束。
The shape of regurgitant jets in 30 patients with eccentric mitral regurgitation showing now convergence region (FCR) was observed.
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