Negative pressure ventilation
Stainless steel shaft
Hot dip galvanized counterweight
The light is downy
Support for custom
Rotating shaft adopts solid stainless steel light circle, opening and closing is stable and reliable. Pulling and opening parts can be added to control opening and closing by winch. Black counterweight block surface after 6 times of treatment, eliminate rust, the overall more beautiful. Various sizes can be customized to meet customer needs.
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