单项选择题
A.Constant volume
B.Constant pressure
C.Pulse pressure
D.Radial flow
单项选择题 Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil?()
单项选择题 If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an ()
单项选择题 Which of the diesel engine cylinder liners listed has internal cooling water passages?()