问题

______ conveys a signal of desired rudder angle from the bridge and activates the power un

______ conveys a signal of desired rudder angle from the bridge and activates the power unit and transmission system unit the desired angle is reached.

A.The control equipment

B.The power unit

C.The transmission system

D.The follow-up mechanism

请帮忙给出正确答案和分析，谢谢！

参考答案

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