| 摘要 |
The ends of the bristles (9) lie on at least two different planes at right angles to the direction in which the bristles extend. At least two tufts (8) of bristles are positioned on a support surface of at most 6 square mm. Either the ends of the bristles of one tuft or the ends of the bristles of adjacent tufts lie on the at least two different planes (10,11,12). |
