Motorcycle engine cylinder head series:Including the exclusive intellectual property of the dual metal cylinder head and water-cooledcylinder head. These products are dluminum casting products.
摩托车发动机汽缸头系列产品：包括独有只是产权的双金属汽缸头和水冷却汽缸头。
2
The cylinder is cooled by a jet of water.
气缸可用喷水冷却。
《牛津词典》
3
Once the cylinder had been filled with steam it was cooled directly by the application of cold water.