亚洲女同国产一区二区,欧美高清视频在线观看,亚洲欧美日本中文在线播放,中文字幕亚洲情99在线,亚洲香蕉免费有线视频

Zhang Gang, the State Council Counselor and his entourage, accompanied by Guo Xiaoyu, the deputy director of Shenzhen Market Supervision Bureau, visited Grandsun on Dec. 29^th, 2011. They tried the intelligent noise cancelling headphone and thumbed up for its outstanding noise cancelling effect. Grandsun has dedicated in efforts of R&D and industrialization of intelligent noise cancelling technology to improve the user experience feeling. This technology has been largely applied in the fields of industry, people livelihood, music enjoyment and hearing protection.