duct line

基本解释

If the cross section area of the two branching ducts are different, the Included angle on the smaller branch duct against the extended center line is usually bigger.
若分枝管的截面积大小不同，则细支管与母管中心延长线间的夹角较大；
Deformation cracks in the underground duct-line at a railway station project was analyzed from the perspective of materials and structures, and the solution was presented.
从材料与结构的角度分析了某大型客站混凝土结构地下风道施工中出现裂缝的原因并提出解决办法。
The line clamp designed in the article can take the place of the explosive pressing duct to take on the tensile force of line in working order. The line and the duct can be protected in this way.
设计的爆压管替代线夹，在电路正常运行的工况下替代爆压续接管承担导线的张力，从而达到保护线路和爆压管的目的。

Professional gardener Chris Roach(ph) stands in line with his heavily duct taped blower.
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