| 摘要 |
<p>There is represented a device including a frame 1, a board 4 fastened thereon, and a drum 3 with the combs 2. The combs are attached onto the drum as circle disposed in the middle of board and installed thereby means of bearings. The combs are fixed on drum as circular bands remote from each other in equal distance, between which rack 5 teeth 6 are passed.</p> |
