In a common seawater cooling system, from the sea suction one o f a pair of seawater circulating pumps provides seawater which circulates the lubricating oil cooler, the jacket water cooler and the piston water cooler before( ).在一般海水冷却系统中，一对海水循环泵中的一个提供海水，海水在排出舷外之前循环润滑油冷却器、缸套水冷却器和活塞水冷却器。