sliding keel
短语un. 中插板 [网络] 滑动龙骨；帆船的滑动龙骨
词形变化
sliding keels
复数
sliding keels
释义与例句
n.
-
1.
An oblong frame let down vertically through the bottom of a vessel in order to deepen the draught and sustain against a side wind.
航海 交通