单选题On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the （）Aaccumulator spring compressorBbalance pistonCcompensating needle valveDproportional piston
单选题
On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the （）
A
accumulator spring compressor
B
balance piston
C
compensating needle valve
D
proportional piston
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