适用于液压缸活塞杆往复运动用密封装置，也可用于法兰端盖的静密封装置。
Apply to reciprocating motion of hydraulic cylinder piston rod sealed device can also be used to cover the static flange seal.
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。
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.
其上、下液压缸活塞交替往复运动，实现了带负载持续上升(下降)和快速作业。
The pistons of the upper and lower hydraulic cylinder make reciprocating motion alternatively to realize on-load continuous rise (drop) and quick operation.
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