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1·Specialized hydraulic equipments and so on production, hydraulic ram, screw swinging cylinder, drill jumbo.

专业生产、液压油缸、螺旋摆动油缸、凿岩台车等液压设备。

2·At first, it studied the plant model of position and force system about valve control unsymmetrical hydraulic ram.

首先，建立了阀控非对称缸位置控制系统与力控制系统的数学模型。

3·Others from V or X shapes. Some canopies are a single piece and some are two pieces with a hydraulic ram at the hinge-joint.

另从V或X形。一些檐篷是一个单一的作品，有些是两件与液压内存在铰链联合。

4·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。

5·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。

6·The ram pump service life's length, with the usual maintenance maintenance, hydraulic fluid quantity and the quality, the fat liquor cleanliness and so on concerns.

柱塞泵使用寿命的长短，与平时的维护保养，液压油的数量和质量，油液清洁度等有关。

7·A control method for ram position of a hydraulic press and the component of the control system are presented. By means of this method, the ram position can accurately be controlled.

介绍一种液压机滑块位置控制方法及其系统组成，采用该方法能够实现液压机滑块位置的精确控制。

8·Double-hydraulic balance is used in up-down parts(ram)to guarantee its stable and reliable movement.

升隆部件（滑枕）采用双液压缸平衡，保证升降运动的稳定。

9·Products like European shop cranes, engine cranes, folding crane, log splitter, hydraulic oil pump for log splitter, digging machine and lift table, long ram hydraulic jacks for crane and so on.

规格如各类欧式吊机、劈柴机油缸、挖掘机油缸、举升平台用油缸、吊机用长行程液压千斤顶等。