| 摘要 |
The cleaner i.e. floor vacuum cleaner (10), has a runner (14) provided with a roller (18) and rotatably or pivotably attached to around an axis on a lower side of housing (12). The runner includes another roller (20) that is arranged adjacent and/or opposite to the former roller in a circumferential direction. The latter roller is formed parallel to a rotational axis of the former roller, where height of the latter roller arranged on the runner is adjusted from 1 to 5 mm in comparison with the former roller. |
