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| Copyright Rosstone Audio Technology Co., Ltd. Manufacturing Base: West, Huangqishan Road, Yonghe Economic Development Zone, Guangzhou Company Add: Room 2201, South Tower, Times New World Center, No.2191, Guangyuan East Road, Tianhe District, Guangzhou Pc:510500 E-mail£ºsales@rosstone.com Tel:+86-20-22822011 22822012 22822013 Fax:+86-20-22822010 |