| 摘要 |
<p>The toothbrush (1) has a handle with a neck holding a base fitted with a multitude of bristles (7). Each of the bristles (7) is wound into a helical shape (2) at its lower end and straight at the top in order to achieve an elastic effect. The lower bristle area can also be bent into a curved or a zigzag shape. When the toothbrush (1) is guided along the teeth the bristles (7) can flexibly follow the contours of the surfaces to be cleaned.</p> |
