The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.<br>A:boss<br>B:knuckle<br>C:skeg<br>D:strut

The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.
A:boss
B:knuckle
C:skeg
D:strut

出自：海船船员证

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