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See Chinese contents: GB/T 13554-2020 GB/T 13554-2020: High efficiency particulate air filter
This Standard specifies classification and marking, materials, structure and production environment, technical requirements, test methods, inspection rules, marks, packaging, transportation and storage for high efficiency air filter and ultra-low penetration air filter. This Standard is applicable to the filter used in air supply and exhaust air purification system and equipment at room temperature.
