| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of repair. SOLUTION: An electric fan, a dust box unit and a revolving brush are put together at the nozzle part of the body of a vacuum cleaner and a handle is also attached to the nozzle part of the body. The upper part of the nozzle or some of the lower part are replaced by other parts. As the upper parts or lower parts and another parts of the nozzle support the working elements of the vacuum cleaner, it can be repaired without removing all the screws, which improves the efficiency of repair.
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