单项选择题 In the （） pressure charging system the pulse of energy that occur as the exhaust is released from the cylinder to improve the output of the turbocharger.

单项选择题 In some designs the cylinder oil is timed so that the oil injects only on the （）.

单项选择题 In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should be taken off and the piston should be （）.