单项选择题
A.Piston wrist pin bushing
B.turbine bearing
C.Spring bearing
D.Diesel engine main bearing
单项选择题 A distorted spray pattern from a fuel injector can cause a diesel engine to have （）
单项选择题 Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?（）
单项选择题 If the speed of a turbocharged diesel engine is maintained constant the turbocharger speed will （）