常見例句雙語例句A highly ventilated lump of cast iron, 338 holes and milling operations, plus lapping cam bearings and all those valve seats!一個高度有通風設備的整鑄鐵， 338孔和銑削行動，加上研磨凸輪軸承和所有這些閥座！www.naf.com.cn 返回 valve lap