keeln.(船的)龙骨v.(船)倾覆;突然倒下;出问题
keel curve direction弯曲方向
Keel-billed Toucann.厚嘴巨嘴鸟
keel laying ceremony起工式
Keelboat men - Star男子星光级
keel disease of ducks幼鸭败血病
Keel over with laughter笑得前俯后仰
keel-centerboard yawl龙骨稳舵小帆船
Keelboat women-Yngling女子索林级。
keel-and-bilge block垫船木块
Keel-Cellano antibodies凯尔-塞拉诺二氏抗体