phenolic foam air duct insulation board Yingde Ventech Air Conditioning Co.,Ltd progresses towards the international market with phenolic foam air duct insulation board in a fast but steady pace. The product we produce is strictly in compliance with international quality standards, which can be reflected in the material selection and management throughout the manufacturing process. A team of professional technicians is designated to inspect the semi-finished and finished product, which greatly increases the qualification ratio of the product.

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