| 摘要 |
The device according to the invention, for suspending the boom 5 from its support 2 to which it is movably connected by means of gravity, is characterised in that it comprises: a detector 22-25 for the geographic attitude of the support 2 acting by means of gravity, control means 16 which are sensitive to the detected attitude of the support 2 and actuation means 11 which are controlled by the control means 16 and which are interposed in the means of connection between the support 2 and the boom 5 for tilting the boom with respect to the horizontal, in a transverse vertical plane, by an angle keeping it parallel to the ground. <IMAGE>
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