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All of the followings are the detainable deficiencies under the SOLAS Convention expert（）.
A:Failure of proper operation of propulsion and other essential machinery, as well as electrical installation
B:Failure of the proper operation of the main and auxiliary steering gear
C:Failure of engineering watch arrangements to confirm to the requirements specified for the ship by Administration
D:Failure of the proper operation of emergency generator, lighting, batteries and switches

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出自：海船船员证

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