亚洲欧美精品是图,国产一区二区精选,国精产品一区一区三区有限是什么,亚洲大片在线观看完整版

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