circular duct meaning in English
圆截面导管
Examples
- At one time circular ducts were very expensive to manufacture .
有一段时期圆管制作非常昂贵。 - 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 - Measurement of fluid flow in closed conduits . velocity - area methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current - meters or pitot static tubes
密封管中流体流量的测定.用电流表或静压皮托管测量圆管道内回旋流或不对称流动流量的速度-面积法 - Measurement of fluid flow in closed conduits - velocity area methods - methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current - meters or pitot static tubes
封闭管道内液体流量测量.第2部分:速度范围法.第3节:用流量计或皮托静压管在圆形管道中涡流或不平衡流动条件下测量流量