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    Group Standard Drafting Unit for General Technical Requirements of Wireless Earphones Lithium ion Batteries,

    Group Standard Drafting Unit for General Technical Requirements of Wireless Earphones Lithium ion Batteries,

    2019-09-23

    2019 China Internation Audio-Fair Shenzhen

     

    In 2019, we are the Group Standard Drafting Unit for General Technical Requirements of Wireless Earphones Lithium ion Batteries.





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