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Straight-4

The straight-4 is an internal combustion engine with four cylinders aligned in one row. This is the most common configuration used in cars with an engine size up to 2.0, in some cases up to 2.6 litres.

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Urethra

... the urethra is about 1-1.5 inches (25-38 mm) long and opens in the vulva between the clitoris and the vaginal opening. In the human male, the urethra is about 8 inches ...