Sustaining, sufficient investment for R&D——5% of annual revenue
Address：No.66 Qiantangjiang Rd., Huimin District, Jiashan, Zhejiang, China, 314100
Email：jinyidong@keysound.cn
Fax：+86-573-84612755
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No.66 Qiantangjiang Rd., Huimin District, Jiashan, Zhejiang, China, 314100
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+86-573-84468088
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Email
jinyidong@keysound.cn
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