单项选择题 Which of the following procedures should be carried out to permit the use of a crosshead engine with an inoperable after-cooler?（）

单项选择题 If cooling water flow through the after-cooler is interrupted,the power output of a turbocharged diesel engine will drop because the （）

单项选择题 The amount of fuel injection into a diesel engine cylinder by a unit injector, is controlled by（）