用做防水分开地防水卷帘门，火警探测器行动后，卷帘门应降落到底。
Serves as the fire protection separation the fire protection roll-up door, after the fire detector movement, the roll-up door should drop.
用做防水分开地防水卷帘门，火警探测器行动后，卷帘门应降落到底。
Serves as the fire protection separation the fire protection roll-up door, after the fire detector movement, the roll-up door should drop.
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