Vessels required to be equipped with an approved backfire flame arrester are（）.<br>A:those with diesel engines<br>B:all those with gasoline engines<br>C:those with large engines only<br>D:None of the above

Vessels required to be equipped with an approved backfire flame arrester are（）.
A:those with diesel engines
B:all those with gasoline engines
C:those with large engines only
D:None of the above

出自：海船船员证

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