单项选择题
A.low firing pressure
B.low exhaust temperature
C.mechanical knock in each cylinder
D.fuel knock in each cylinder
单项选择题 The cylinder liner forming the cylinder wall and the inside of the water jacket is called a（）
单项选择题 Which of the listed devices could be used as a substitute for a ring grooving tool?（）
单项选择题 In which of the scavenging methods listed will the exhaust valve be located in the cylinder head?（）