常见例句双语例句A highly ventilated lump of cast iron, 338 holes and milling operations, plus lapping cam bearings and all those valve seats!一个高度有通风设备的整铸铁， 338孔和铣削行动，加上研磨凸轮轴承和所有这些阀座！www.naf.com.cn 返回 valve lap