| 摘要 |
The invention relates to a piston ring for an internal combustion engine or for a compressor, in particular a piston ring comprising an exterior running surface (3), two flanks (5, 6), and an interior circumferential surface (7); the running surface (3) has a profiled section with a groove (2), said groove (2) being located between an upper portion (3') of the running surface and a lower portion (3") of the running surface in relation to the cross-section of the piston ring (1). |
