单项选择题
A.A bitt B.A bulkhead C.A V-spring D.A fishplate
A.To support the overhang of the stern B.To provide strength to shell plating at the stern C.To add strength to the deck beams which support the weather decks D.To support the plating of a cylindrical tank
A.Provides surface for applying force on machinery B.Provides landing surface for the sounding bob C.Absorbs machinery vibration D.Prevents valve stem over-travel