When we use the aluminiumalloypipe to make heat exchanger, we must use expanding.
用铝合金管材制作散热器须进行扩口加工，其间往往会因为管材端部出现裂口而报废。
2
Use a hanging clamp to separate the aluminiumalloypipe form the partition board.
安装方法二、利用吊夹把铝合金管与隔断分离开。
3
When we use the aluminiumalloypipe to make heat exchanger, we must use expanding. During that process the pipes usually become useless because of the end crack.