单选题The type of davit on which you must turn a crank in order to swing the lifeboat out over the ship’s side is a（）.Asheath-screw davitBgravity davitCradial davitDbruckner davit
单选题
The type of davit on which you must turn a crank in order to swing the lifeboat out over the ship’s side is a（）.
A
sheath-screw davit
B
gravity davit
C
radial davit
D
bruckner davit
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