单项选择题 In the event of the cylinder starting valve leakage （） would pass into the air pipes and ignite the oil deposited.

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 （）.