Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）<br>A:Electric<br>B:Hydraulic<br>C:Air<br>D:All of the above

Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）
A:Electric
B:Hydraulic
C:Air
D:All of the above

出自：海船船员证

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