Protection device: rapid rolling door is arranged at the bottom of the photoelectric device, touch the obstacles in the process of closing down, stop immediately rebound.
保护装置：快速卷门门柱底部装有光电装置，在关闭的过程中触及障碍物，立即停止下降反弹回升。
Protection device: rapid rolling door is arranged at the bottom of the photoelectric device, touch the obstacles in the process of closing down, stop immediately rebound.
保护装置：快速卷门门柱底部装有光电装置，在关闭的过程中触及障碍物，立即停止下降反弹回升。
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