单项选择题
What is used to prevent twisting of a towing bridle?（）
A.A bitt B.A bulkhead C.A V-spring D.A fishplate
单项选择题 What is the purpose of cant frames in steel vessels? （）
单项选择题 What is the purpose of a striker plate? （）
单项选择题 What is NOT used as a stern tube bearing，on a large vessel? （）
