It is termed backward because of the opposite direction of the flow of the metal to that of ram movement. Thus, the billet in the container remains stationary and hence no friction.
这个过程被称作反向挤压就是因为金属的流动方向与推杆的移动方向相反。
Alternatively the ejector rod may be coupled directly to the hydraulic ram so that forward and rearward movement of the ejection System may be achieved.
另一种顶棒可以直接和液压缸活塞偶合所以可以实现顶料系统的向前和向后运动。
In this article, the author introduces the lateral movement equipment in construction of railroad bridge , which adopts hydraulic ram to transfer the beam at the top of pile.
介绍了一套铁路桥梁施工中，采用液压油缸使梁体在墩顶横向平移的设备，详细叙述了该设备的系统组成、原理、设计构想、施工工艺及在实际施工中的安全注意事项等。
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