| 摘要 |
It comprises a framework composed of horizontal and transverse beams, at least one working member (6), such as a tooth or plough- share, being fixed to a transverse beam (1) via a support (2), characterised in that it comprises, on the one hand, trip means mounted on the said framework and connected to the said working member and, on the other hand, an energy accumulator cooperating with the said trip means. <IMAGE> |
