单项选择题
The cooling water is in direct contact with the outer surface of the liner as a result of which it is termed a （）.
A.water liner B.wet liner C.dry liner D.drown liner
单项选择题 The cooling of the piston is carried out by circulating （） across the underside of the crown and inside the ring belt or through specially shaped passages.
单项选择题 The cooling liquid used for the cylinder may be referred to as （）.
单项选择题 The cooler as the liquid becomes, （）.
