| 摘要 |
The sawblades (11) are mounted on vertically adjustable arms (23) connected to a frame (25) and capable of being swung up and down between a raised (passive) position and a lowered (active position) with the aid of a control device, comprising a cylinder (35) provided between each arm and the frame, and a frame-mounted rotatable axle (28) that can be moved backwards and forwards. Each arm is connected to the axle via a link (29). |
