国产自在线拍免費資訊_日韩欧美永久中文_中文亚洲色在线影院_我们的天堂电影在线播放_午夜欧美一级福利_特黄做受又大又粗又硬大片_国产区成人综合色在线_秋霞成人伦理电影_久久亚洲天堂成人_欧洲精品色视频在线观看

The roll door machine should be installed and maintained by professionals, and must have good protection grounding, otherwise it may cause personal safety;

When the shutter door is on, it is forbidden to stand or peer, and there shall be no obstruction under the curtain.

Check the movable part of the door regularly to ensure the operation will not be blocked, keep lubrication