单选题If the relief valve on a diesel engine cylinder lifts, the cause could be due to （）Aliquid in the cylinderBlow compression in the cylinderChigh exhaust temperatureDpoor fuel penetration
单选题
If the relief valve on a diesel engine cylinder lifts, the cause could be due to （）
A
liquid in the cylinder
B
low compression in the cylinder
C
high exhaust temperature
D
poor fuel penetration
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