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单选题
When a diesel engine compression pressure is checked, the indicator is connected to the （）
A
cylinder exhaust ports
B
injection line
C
cylinder indicator cock
D
banjo oiler line
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low exhaust valve liftC
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improperly seated valvesC
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the lubricating pumps are stopped and the access doors are openedB
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考题
单选题In a （） engine the charge of air in the cylinder before compression commences is above atmospheric pressure.A
pressure chargedB
naturally aspiratedC
contaminatedD
high speed diesel
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