| 21. | This produces huge amounts of wear in piston rings and god-alone-only-knows how much additional wear.
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| 22. | Today, according to Rao, the company exports piston rings to countries like Singapore and Malaysia.
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| 23. | Cofap, the world's third-largest piston ring maker, rose 22 percent in the past two sessions.
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| 24. | The break-in period required has changed over the years with improved piston ring materials and designs.
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| 25. | Piston ring flutter occurs when the rings oscillate vertically within the piston grooves they reside in.
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| 26. | "' Obturator rings "'are a specific type of piston ring used in World War I cylinders.
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| 27. | Aluminum cylinder bore engine piston rings break-in faster than those used on cast iron cylinder bores.
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| 28. | The goal of modern engine break-ins is the settling of piston rings into an engine's cylinder wall.
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| 29. | The following morning, it was discovered that four of the engine's cylinders also had cracked piston rings.
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| 30. | :Have you read the piston ring article?
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