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Air duct, air conditioner pipe, fire sprinkler system. Air flow and ventilation system. Building interior. Ceiling lamp light Royalty Free Stock Photo

Air duct, air conditioner pipe and fire sprinkler system on white ceiling wall. Air flow and ventilation system. Building interior Royalty Free Stock Photo

Empty chair and table in the room. Air duct, air conditioner pipe, wiring pipe, and fire sprinkler system. Air flow and Royalty Free Stock Photo

Ceiling lamp with opened light and air duct hanging on ceiling. Air conditioner pipe system. Air ventilation system. Fire sprinkle Royalty Free Stock Photo

Air duct, air conditioner pipe, fire sprinkler system. Air flow and ventilation system. Building interior. Ceiling lamp light

Air duct, air conditioner pipe, wiring pipe, and fire sprinkler system. Air flow and ventilation system. Building interior. Royalty Free Stock Photo

Air duct, air conditioner pipe, fire sprinkler and wiring system. Building interior. Ceiling lamp light with opened light. Royalty Free Stock Photo

Air duct, air conditioner pipe, fire sprinkler system. Air flow and ventilation system. Building interior. Ceiling lamp light with opened light. Interior architecture. Glass wall building