Enforce Air Recirculation 加强空气循环 air recirculation zone 空气环流地带 ; 气孔须高于建筑物之循环气层 ; 高于建筑物之循环气层 air recirculation system 空气再循环系统 ..
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local air recirculation zone 局部空气环流地带
The presence of primary hole air flows remarkably squeezes the recirculation zone, resulting in a elliptic-like cross section, with the long axis is longer than the short one up to 1.6 times.
发现真实结构燃烧室内的回流区不再是轴对称，主燃孔和二次气流的存在使回流区明显被压扁（最扁处的长轴约为短轴的1.6倍）；
The blade-type swirlers have been used in many air engine combustors to control the primary airflow of flame tube and establish a strong recirculation zone.
航空喷气发动机燃烧室中广泛采用叶片涡流器来控制火焰筒的一次空气流量，并建立强回流区。
Oven consist of two zone, preheating, solidify zone, and with high speed hot air recirculation system.
烘炉包括2个区域，预热、巩固区域和高速空气循环系统。
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