单选题A substantial increase pressure could be an indication of a/an （）Aworn cylinder linerBfaulty cylinder relief valveCexcessive lube oil pressureDexcessive scavenge air pressure
单选题
A substantial increase pressure could be an indication of a/an （）
A
worn cylinder liner
B
faulty cylinder relief valve
C
excessive lube oil pressure
D
excessive scavenge air pressure
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