| 摘要 |
PROBLEM TO BE SOLVED: To reduce noise while reducing a quantity of exhaust air from a vacuum cleaner. SOLUTION: An auxiliary filter is provided at the lower part a motor-driven blower cover 290 of a motor-driven blower 270. The exhaust air is discharged by guiding the exhaust air into an exhaust port 271 on the back part, exhaust ports 215, 216 of wheels 212, 213, and exhaust ports 332a, 332b of bumpers 231a, 232b.
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