Labyrinth seal and piston ring provide a dual sealing system, keeping oil clean and reducing wear.

曲径汽封和活塞环提供了双密封系统，使油保持洁净并减少磨损。

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Labyrinth seal and piston ring provide a dual sealing system, keeping oil clean and reducing wear.

曲径汽封和活塞环提供了双密封系统，使油保持洁净并减少磨损。

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