| 摘要 |
The nozzle has a bent shape, preferably in the shape of an arc or semicircle. MECHANICAL ENGINEERING - PREFERRED FEATURES : The semicircle or arc is formed by a partial circle from 100-250 (160-210) deg. . Slits and/or round holes (2, 3) are present in the nozzle, which is coupled to the vacuum cleaner pipe via an adaptor (6). A movable sleeve (5) is used to control air flow and therefore vacuum. |
