铝合金材料多是空芯薄壁组合断面

1.方便使用

2.减轻重量

3.截面具有较高的抗弯强度,做成的门窗耐用,变形小。

Aluminum alloy materials are mostly hollow and thin-walled composite sections，
. Easy to use
. Reduce weight
. section has high bending strength, making doors and windows durable and less deformed