Compressed air is used on board ship （）.<br>A:for starting diesel engines<br>B:in pneumatic control system<br>C:in pneumatic tools<br>D:All the above are true

Compressed air is used on board ship （）.
A:for starting diesel engines
B:in pneumatic control system
C:in pneumatic tools
D:All the above are true

出自：海船船员证

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