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Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）
A:Control the amount of lube oil burned in the combustion chamber
B:Transmit heat from the piston to the cylinder liner
C:Prevent damage to ring groove inserts by acting as a heat dam
D:Dissipate combustion chamber gas pressure by channeling it through the ring gap

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出自：海船船员证

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