高强铝合金是常温下强度最高的铝合金，在航空航天、汽车、轻型轨道交通等工业部门有着及其广泛的应用。

High strength aluminum alloys have the highest strength in room temperature which has very wide range of engineering applications, including aerospace, automobile, light railway traffic etc.

轨道交通所到之处即城市。

Where there is railway, there is a city.

由于高速铁路系统，轨道交通彻底改变了。

Rail has completely changed because of the high-speed system.

长沙轨道交通建设一直备受市民关注。

Subway construction has drawn much public concern in Changsha.

热空气焊接用于多种焊接，如通风管，轻型窗帘，轻型油布产品。

The hot air welding is used in the welding of multiple panels to make products such as ventilation tubes, light weight curtains and light weight tarps.