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Hongte stands out from the fierce competition of manufacturing phenolic insulation board manufacturers. We develop rapidly in recent years. fiberglass duct board is the main product of Hongte. It is diverse in variety. Ventech rigid fiberglass duct board has been certified according to some key certificates. These certificates mainly include national compulsory product certification (CCC), IEC electrical safety standards, etc. This product fills demand gaps in the industry.
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