adj.无管的；无导管的

Carrying down or away. Used of a duct or vessel. 传送的指通过导管或管道传送下来的或输送的

A duct often contains cross braces. 管道内往往是有支撑拉条。

A tube or duct for enclosing electric wires or cable. 线管包裹电线或电缆的管子或沟道

A/C duct and vent duct structure of W/H Deck. 驾驶甲板空调、机械风管结构。

Maybe you have never heard of duct tape. 也许你还没有听说过管道胶带吧。

The tie on the cystic duct may slip off. 在胆囊管上的结扎可能滑脱。