The （） returns the pump operating rod to mid position as soon as the helmsman stops turning the wheel.<br>A:hunting gear<br>B:cut-off level<br>C:servo-motor<br>D:swivel block

The （） returns the pump operating rod to mid position as soon as the helmsman stops turning the wheel.
A:hunting gear
B:cut-off level
C:servo-motor
D:swivel block

出自：海船船员证

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