Most pedestal crane power is provided by（）.<br>A:Electro-hydraulic units<br>B:Steam units<br>C:Independent internal combustion power units<br>D:All of the above

Most pedestal crane power is provided by（）.
A:Electro-hydraulic units
B:Steam units
C:Independent internal combustion power units
D:All of the above

出自：海船船员证

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