| 摘要 |
<p>The device (10) has a head module (M1), an intermediate module (Mi) and a tail module (Mn) connected together by corresponding joints (Ai, Ai+1). The joints liberate rotational movements in median planes (PH, PV) of the device around axes (Hi, Hi+1, Vi, Vi+1) perpendicular to the planes, respectively. Each joint between the intermediate and tail module is realized by a junction piece comprising a pivot connection of the first axis with the intermediate module, and a pivot connection of the second axis with the tail module.</p> |
