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Ventech excels in integrating the design, manufacture, sales and service of fiberglass duct board together. Hongte's main products include pre-insulated duct panel series. Reliable raw materials: the raw materials of Ventech phenolic foam insulation board are subject to rules and regulations of the factory. They are selected from a supplier that possesses unique know-how and technology. The product is carefully examined to make sure that it is free from flaws.
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