double water outer cooling

• 双水外冷

double water outer cooling的用法和样例：

例句

1. However, the compensator cracked in the next year when it was used to offer heat by disemboguing the hot water in it after it has been used in the last year.
   在第二年供热前注水时发现有的补偿器产生了断裂，致使大量水外溢。