单项选择题
A.capstan B.dog wheel C.fairlead D.wildcat
The sprocket teeth on a wildcat are known as the（）.A.pa...
单项选择题The sprocket teeth on a wildcat are known as the（）.
A.pawls B.devil's claws C.whelps D.pockets
The ratio of the height of a vessel’s rudder to its wid...
单项选择题The ratio of the height of a vessel’s rudder to its width is referred to as the（）.
A.aspect ratio B.constriction ratio C.rudder ratio D.steering ratio
The projecting lugs of the rudderpost which furnish sup...
单项选择题The projecting lugs of the rudderpost which furnish support to the rudder are called（）.
A.bases B.gudgeons C.pintles D.rudder lugs
