| 摘要 |
<p>Accumulated debris is removed from building ducts by agitating the debris, with a nozzle-headed air hose (74, 101), as air flows through the ducts. The nozzle (76, 102) has ports (110) arranged so that air jets (114) cause the hose (74, 101) to whip around inside the ducts. A borescope (50) is used to simultaneously monitor progress of the cleaning. Filters (62, 70) are provided over all duct openings to collect debris and prevent it from escaping during cleaning.</p> |
