光幕保护 Lightcurtain protection 门开启和关闭期间，覆盖整个门高度的几十束红外光线探测乘客和物体的门保护住装置。
Multiple infrared light beams covering the full height of the door as the opens or close detect passengers or objects.
光幕保护 Lightcurtain protection 门开启和关闭期间，覆盖整个门高度的几十束红外光线探测乘客和物体的门保护住装置。
Multiple infrared light beams covering the full height of the door as the opens or close detect passengers or objects.
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