| 摘要 |
The fence (10) has a central support console (11) on which a set of sliding panels (12, 13) is mounted. The panels are moved in two opposed direction for giving access to a set of unloading quays. A control unit (14) is arranged to authorize successive and alternative displacement of the set of panels so as to slide one panel in parallel with regard to another panel to release access to one quay. The latter panel is slid in parallel with regard to the former panel so as to release access to another quay when the former panel takes an initial position to prohibit access to the former quay. |
