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| Higher Output Low Fuel Consumption,
Low or Zero Emissions |  |
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| 1. | Improve
scuffing and wear resistance to allow for higher compression and longer life
Example: Change ring shape or modify surface treatment |
| | | 2. | Reduce
friction loss Example: Develop narrower compression and oil control
rings | |  |
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Gasoline engine piston ring sets | | |

Diesel engine piston ring sets | |