钢质双片防火卷帘：
Steel double sheet fireproof roller shutter:
它属于复合型的，关键是由防火的滑轨、电机、秘药、控制柜、主帘板、辅助板构成D型帘板、小五金、空心填有不燃隔防火保护材料，不需要水帘维护，相比其钢度更强、耐火时间更久，其特性和品质均达到标准的，耐火时间在三小时以上也不会丧失其完整性；
It belongs to the composite type, which is composed of fireproof sliding rails, motors, secret medicine, control cabinets, main curtain panels, and auxiliary panels, forming a D-shaped curtain panel. The hardware is hollow and filled with non combustible fireproof protective materials, without the need for water curtain maintenance. Compared to its stronger rigidity and longer fire resistance time, its characteristics and quality meet the standards, and its integrity will not be lost even if the fire resistance time is more than three hours;
钢制防火卷帘
Steel fireproof roller shutter
从而看得出他们的不同关键为：
Thus, it can be seen that their different key points are:
1、其帘片不同，一个是片式的，一个是双片的；
1. The curtain panels are different, one is sheet type, and the other is double sheet;
2、薄厚不同，双片的要比片式的厚；
2. The thickness is different, and the thickness of a double piece is thicker than that of a single piece;
3、双片的比片式的耐火时间更久，更耐用；
3. The dual panel has a longer fire resistance time and is more durable than the single panel;
他们的相同点也是许多的，例如：
They also have many similarities, such as:
1、表面都那么整平、美观、舒适；
1. The surface is so flat, beautiful, and comfortable;
2、都有手动和电动双作用开闭设备；
2. Both manual and electric double acting opening and closing devices are available;
3、都是做为建筑的防火分隔墙应用。
3. They are all used as fireproof partition walls in buildings.