| 摘要 |
<p>A hollow cylinder (13) pivots on the lengthwise middle axis of the controller drum (11). At least one sheet metal section (21,22) has at least one guide-track (16,17). The sheet metal panel is molded into a ring in the peripheral direction of the controller drum so that the overlapping ends (19,20) of the section face each other and are joined. At least one end has an attachment (19a) fitting into a cavity (20a) in the opposite end, for joining.</p> |
