Motorcycle engine cylinder head series:Including the exclusive intellectual property of the dual metal cylinder head and water-cooled cylinder 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。

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The cylinder is cooled by a jet of water.

气缸可用喷水冷却。

《牛津词典》

Once the cylinder had been filled with steam it was cooled directly by the application of cold water.

蒸汽充溢汽缸后，它会因为冷水的温度而直接冷却。

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That doesn't make it quite as "open-air" as a true convertible, but it does let you more easily hear the roar of that water-cooled, 320-horsepower, 3.6-liter six-cylinder and get a lot of oxygen into the cabin.

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