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| Piston rings |
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Pistons have rings in grooves on their external surface and these put pressure on the cylinder walls and guarantee a seal. Their objective is to reduce as much as possible the surface contact between the piston and the cylinders. and to reduce any friction. but maintaining the air tight seal at the same time for the oil and gases at any temperature and under high pressure. There are two types of rings: compression and scrapers. The former are usually made of steel. The scraper rings. on the other hand. are mounted below the compression rings. and eliminate the excess oil during the the piston�s up and down movement.
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| Pitching |
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This is the forward and backward movement of the driver or passengers in a vehicle that is caused when accelerating or braking sharply.
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| Pit-Lane |
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At a circuit it is the place where the motorcycles enter and leave the pits.
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