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Utility model patent certificate for audio amplifier chip and electronic device

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E-mail：huangjinghua@yfwdz.cn
Phone：+86 13534263752
Add：Room 901, Halo Plaza IV, No. 260 Taoyuan Road, Sunxi Subdistrict, Sungang Street, Luohu District, Shenzhen City, Guangdong Province, China.

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