密封唇压力较高，适用于气体及磨耗性流体。
Sealing lip can resist high pressure, apply in gas and abradability fluid.
除了平衡涡旋内部压缩气体压力以外，还提供了顶端和底槽间的密封力，该密封力靠浮动密封圈来实现。
In addition to balance vortex internal pressure of compressed gas beyond, still provides top and bottom sealing force between the slot, the sealing force to achieve by floating sealing ring.
高压气体流过密封环顶端并进入其后面，施加向外的压力到缸筒壁上。
It passes over the top of the ring, and gets behind it to force it outward against the cylinder wall.
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