| 摘要 |
<p>A tiltable member (12) is pivotally mounted on a support member (18). The tiltable member (12) is connected to an actuator by a plurality of control wires (80, 82, 84) which are axially movable in respective sheaths (74, 76, 78) so that the orientation of the tiltable member (12) can be adjusted by a remote actuator. An additional control wire (96) connects the actuator to clutch means (26-36) arranged to vary the friction between the tiltable member (12) and the support member (18, 140). <IMAGE></p> |
