单项选择题
The term PINTLE AND GUDGEON are associated with the（）.
A.anchor windlass B.jumbo boom C.rudder D.steering engine
单项选择题 The sprocket wheel in a windlass，used for heaving in the anchor，is called a（）.
单项选择题 The sprocket teeth on a wildcat are known as the（）.
单项选择题 The ratio of the height of a vessel’s rudder to its width is referred to as the（）.
