每台系统包括1台油泵连接2台双向液压油缸和一台双向液压推进油缸。
Each separate arrangement consists of one (1) pump unit connected to two (2) double acting side-launching cylinders and one (1) double acting launching cylinder.
推进油缸靠在工作面输送镏槽上，它的位置是通过支架的推进油缸的推进力来保持不变，作用在支架的两边。
The advancing ram acts against the face conveyor panline, whose position is held unchanged by the advancing rams, forces of the supports that are set on both sides of the support to be advanced.
最后，支架的推力油缸试图向前推进输送机和为下一次切割做准备。
Finally, the advancing ram of the support in question is extended to push the conveyor forward and becomes ready for the next cut.
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