Standard for safety for closure systems for use with flexible air ducts and air connectors 与柔性风管和风管接头一起使用的密闭系统的安全标准
In order to avoid unnecessary washing we do not recommend the duct being the only filter 为了避免不必要的清洗，我们不建议风管是唯一的过滤器。
The compound bolivian filament wind tube and the galvanized iron sheet wind tube technical economy compares 复合玻纤风管与镀锌铁皮风管的技术经济比较
Low cost : the size of the average cost of the wind than galvanized sheet ( including insulation ) low 造价低：大小管平均造价比镀锌板风管（含保温）低。
Friction coefficient along the way : along the friction coefficient close to the wind of galvanized iron sheets 沿程摩阻系数：沿程摩阻系数接近镀锌铁皮风管。
Represents the friction calculation chart of the duct for graphic calculation during project design 给出了柔性风管完全展开时的阻力计算图，可供工程设计时使用。
6 . occupy space to be highly little , adapt to layers of high insufficient building ventiulation tuber pipe of space 6占有空间高度小，适应层高不足的建筑空间的通风风管。
Saint admont and has 10 , 000 pipes . this church has a very large hall , so the sound of the organ is very fantastic 它拥有一万个风管，教堂有著极佳的空间，所以管风琴听起来简直棒极了！
An effective way of solving this is by using textile ducts which are easily removed and washed in a washing machine 解决这个问题的最好方法就是使用拆装方便，便于在洗衣机里清洗的纤维风管。
It also has firstly applies the air - system net concept to conjunction duct system with computer technology 软件首次应用风系统网络的概念，将风管系统与计算机技术结合起来，描述了管段的数据结构。
