风喉 meaning in Chinese

oxygen hose

Fixing the flange into the duct by various methods , spot welding or riveting . spacing for fastening to be as dw144 table 5
可用点焊或锅钉等方法将法兰架固定风喉尾端，而固定距离须按dw144 table 5标准。
Low - velocity ducts , high - velocity ducts , spiral ducts , flexible ducts , square ducts , circular ducts , upvc ducts , air curtains , etc . fans & dampers
低速喉、高速喉、旋式喉、软接喉、方型喉、圆型喉、胶风喉、风闸等fans & dampers风扇及节气闸