| 摘要 |
<p>The invention relates to a method and a device related to a working arm (2), especially to a working arm in a digging machine, forest machine, woodworking machine or the like, in whose free end a manoeuvring device (15) is carried, whereby the manoeuvring device (15) comprises a rotation device (20) in order to exert a movement of rotation on a working tool (5). An electrical swivel (60) is used for bringing about an electrical communication and/or signal communication past the rotation device (20).</p> |
