单词centreboard
n.: (帆船的)稳向板龙骨网络: 中央板;船舵片;中心翼板
(帆船的)稳向板龙骨:
a board that can be passed through a hole in the bottom of a sailing boat to keep it steady when sailing
装有升降板的小船
(船底中心的)垂直升降板
复数:centreboards