| 摘要 |
A duct with a cleaning tunnel is provided to keep room air fresh and clean by cleaning interior impurities from a duct buried in a ceiling. A plurality of tunnels(21) are mounted at an upper part of a duct(20). Each socket(22) penetrates each of the tunnels vertically, wherein the sockets are disposed at a uniform interval from each other and inserted with nozzles(10) formed with injection holes.
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