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      • High-temperature Resistance and High-Efficiency Box Filter Cobetter high-temperature and high-efficiency filters are made of low-resistance fine glass fiber filter paper with aluminum foil separation and the outer frame can be selected as aluminum alloy or stainless steel, which is sealed with high temperature resisted sealant. They are mainly used for high-temperature air purification equipments and systems, such as high-temperature sterilization tunnels, ultra-clean ovens, etc., owing to the good performance of high temperature resistance (long-
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