单项选择题
The Tonnage Certificate gives（）of a vessel which is classified into gross tonnage and net tonnage.
A.the descriptions B.the measurements C.the specifications D.the prescriptions
单项选择题 The term PINTLE AND GUDGEON are associated with the（）.
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（）.
