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Patent：2024 Vehicle air conditioner filterPatent：2024 Multifunctional vehicle air conditioning filter netPatent：2023 Antibacterial and antiviral metal nanoparticle composition structureCertification：醫療器材許可證（第 1 等級）（Taiwan Food and Drug Administration (TFDA)）Certification：ISO 14001Certification：ISO 9001Company website：https://changfong.com.twPhone：02-22681996Main product：Yarn spinning

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