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guangzhou longest science & technology co., ltd.

address: 5&6 f, building b4, no.11, kaiyuan avenue, science city, guangzhou hi-tech industrial development zone, guangzhou, 510530, china

tel: 86 20 6635 3999 

fax: 86 20 6635 3920

e-mail: export@longest.cn

website: www.longest.cn


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