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Compression testing measures the ability of an engine to compress its air-fuel mixture properly. This compression is crucial for the engine to operate efficiently and effectively. When you pull the starter rope on a small engine, the piston moves down the cylinder, allowing air and fuel to enter the combustion chamber. As the piston moves back up, it compresses this mixture. The higher the compression, the more power the engine can produce.


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One of the greatest advantages of double-decker coaches is their role in sightseeing tours. For many tourists, these coaches represent the perfect way to explore a new city. The upper deck provides an unobstructed view of iconic landmarks and hidden gems alike. Whether it's the iconic skyline of New York, the historic sites of London, or the picturesque streets of Paris, a ride on a double-decker coach offers a vantage point that simply can't be matched.


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