股流 meaning in English

plume

Optimum design of multistream plate - fin heat exchanger
多股流板翅式换热器的优化设计
Numerical analysis of the fin bypass of multi - stream plate - fin heat exchanger
多股流板翅式换热器翅片旁通的数值分析
A small slipstream of circulating hf acid is regenerated internally to mantain acid purity at the desired level
为了使酸纯度维持在目标水平，需要从氢氟酸循环流分出一小股流使其再生？