Shandong Beideli HVAC Equipment Co., Ltd.  

HVAC AIR DUCT, CROUND AIR-SUPPLY TUPERE, CATALOGUE, HVAC DUCT DAMPER, HVAC ACCESSORIES, HDPE AIR VENTILATION PIPE, VENTILATION DUCT ALUMINUM FOIL FLEXIBLE TUBE ALUMINUM DUCTING, HVAC AIR DIFFUSER, CELLING AIR-SUPPLY TUPERE