Adjustments to the compensating needle valve in a hydraulic governor should be made with the engine at （）<br>A:maximum power at a normal load<br>B:maximum power and load under normal conditions<br>C:half speed and normal temperature<br>D:normal operating temperature without a load

Adjustments to the compensating needle valve in a hydraulic governor should be made with the engine at （）
A:maximum power at a normal load
B:maximum power and load under normal conditions
C:half speed and normal temperature
D:normal operating temperature without a load

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