... flare外飘,外张 flat of keel平板龙骨 fleets of vessels船队 ...
2
?平板龙骨宽度
... 内平板龙骨 inner flat keel ; inner keel 平板龙骨宽度flat of keel 外平板龙骨外龙骨 outer keel ...
双语例句
1
All sailboats need a keelof board for this reason: the narrow, flat surface of the board or keel produces little drag when the boat moves forward but resists motion sideways.