| 摘要 |
<p>The device is made of moulded plastic and consists of a sweeping-up tray (1) combined with a brush (2) moving in grooves (3). The width of the brush is equal to that of the entry side of the sweeping-up tray. The grooves hold each one extremity of the brush and are connected together by a cross-piece (10). The cross-piece synchronises the oscillation of the brush. When the brush is moved towards the tray and held there, the collected dust is held without spillage.</p> |
