ventilation duct,air duct,flexible duct (ISO9001,ISO14001) Soft hose,air duct,ventialting parts The introduction of soft hose,air duct,air pipe ... . Ventilation hoses are: aluminum foil flexible duct, flexible air duct insulation, single and double layer duct. High temperature hoses are: synthetic ... pipe,composite pipe, glassfiber composite pipe, anti wear duct. Can be widely used in all kinds of ...