| 摘要 |
A beater drum includes a shaft of rotating the drum, underbeaters, beaters, in doing so the underbeaters are connected to the shaft by end supporting disks. A pipe is mounted onto the end supporting disks, and the underbeaters are made on the pipe as outer corrugations which divide the pipe into equal sectors according to the number of the beaters, the corrugations are arranged along the entire length of the drum in parallel to rotational axis thereof and on each corrugation a beater is mounted. |
