Cooling System. There are five positions for digit 11.
1. With cooled cavity plates.
2. With cooled cores.
3. With cooled cavities.
4. With cooled cores and cavities.
5. Optimum cooling.
參考答案:冷却系统. 有5位数字为11. 1. 与冷却腔板. 2. 与冷却结晶. 3. 与冷却腔. 4. 与冷却芯、溶洞. 5. 最佳降温