Aluminum alloyshutter door is no longer like the traditional rolling shutter door switch, it reduces the noise to a minimum will not cause noise problems.
铝合金卷帘门不再像传统卷帘门的开关那样，它把噪音降到了最低不会使人产生噪音的困扰。
2
The door and window are designed as steel fire protective door, aluminum alloy window and shutter.
门窗设计：主要有钢质防火门、铝合金窗及百叶窗。
3
The door and window are designed as steel fire protective door, aluminum alloy window and shutter.