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Many car engines are cooled by water. 许多汽车发动机都是用水冷却的。
The fuel burner of an open - hearth furnace is water - cool, as is the valve that regulates the flow of air and waste gases. 平炉的燃料燃烧室是用水冷却的，控制空气和废气的阀也是水冷的。