It is better to have compensation slot at the bottom of the piston surrounding ringslot to connect with the compensation hole through the compensation slot.
最好在活塞周面环槽底开有补偿槽，通过补偿槽与补偿孔连通。
2
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.
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。
3
This paper introduces the cause of the seepage in valve box of oil isolation pump, and solves the problem of the valve box seepage by way of the improvement of die slot in O - ring and seal material.