| 单词 | air duct |
| 释义 | Word Frequency air duct(ɛə dʌkt) noun a pipe or channel permitting air to travel through a system, building, or other structure, such as a mine The cooled air is then recirculated back to the central heating unit through a centralreturn air duct. There was also a newly installed air duct to provide oxygen inside the tiny room. |
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