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All rights reserved: ©beijing telesound electronics co.,LTD.The 京ICP备15029239号-1
Correspondence address: the haidian district of Beijing shangdi seven street no. 1 huizhong building 1 floor five layer
Technical support: 
300.cn Beijing

Tel : 010-6298 8833
Fax : 010-6298 5522
Mail editor: 100085