The swirl number of secondary air has a great influence on the combustion. When swirl number is small(S<0.8), the fire is long, and may rush the back wall.
二次风旋流强度的变化对炉内燃烧影响较大，旋流数过小时（S<0.8），火焰将冲刷后墙；
Vertigo in TCM means dazzle and swirl. The pathogeny of it includes: sputum, wind, fire, deficiency of qi and blood, deficiency of liver and kidney, ecchymosis .
中医的眩晕是以头晕目眩为主症的疾病，其病因病机包括：痰浊中阻、风阳上扰、肝火上炎、气血亏虚、肝肾两虚、瘀血阻窍等。
Vertigo in TCM means dazzle and swirl. The pathogeny of it includes: sputum, wind, fire, deficiency of qi and blood, deficiency of liver and kidney, ecchymosis .
中医的眩晕是以头晕目眩为主症的疾病，其病因病机包括：痰浊中阻、风阳上扰、肝火上炎、气血亏虚、肝肾两虚、瘀血阻窍等。
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