| 摘要 |
<p>The invention relates to a device comprising an endless conveyor belt (1) and a driving cylinder (2) for feeding the conveyor belt, as well as means for generating the tractive force required for feeding the conveyor belt, the means comprising at least one closed space (3), where hydraulic or pneumatic pressure higher than the ambient pressure is maintained within a portion of the feeding profile of the conveyor belt.</p> |
