| 摘要 |
The arm comprises two sections 3, 4 one of which may be folded up over the other by virtue of driving means 6 comprising a jack 7 articulated on one of the sections 3, 4 and a pair of connecting rods 10, 11 one end of which is articulated on the rod 12 of the jack 7, while the other ends of these connecting rods 10, 11 are articulated with one on one of the said sections and the other on the other section. <IMAGE>
|
