This paper can provide good reference for improving air conduit constitution.

因此实践对风管构造的改进具有较好的参照价值。

Producing little stretch distortion and having no flection under permitted air speed and pressure are the criterions of assessing air conduit capacity based on its bearing load.

基于风管所承受的各种荷载来评定其工作能力，通常在允许的气流速度（或压力）下，是否只产生较小的弹性变形，而不产生屈曲。

A conduit (18) for an air duster is branched from an intermediate part of an air conduit (17) interconnecting an air supply source (16), which supplies compressed air, and an air tool.

用于空气除尘器的管道(18)从连接空气供应源(16)与气动工具的空气管道(17)的中间部分分支出来，所述空气供应源供应压缩空气。