短語詞組短語Overhead camshaft valve train 頂置凸輪軸氣閥傳動Overhead -valve engine [機]頂置氣門發(fā)動機;頂閥式發(fā)動機;頂閥發(fā)動機overhead d valve 頂置式氣門ohv overhead valve 頂置氣門;頂閥overhead valve cylinder 架設開關(guān)筒overhead valve position 頂置閥門配置overhead valve push rod 頂置氣門推桿 返回 overhead valve