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2012年12月26日,国内新锐耳机品牌贝尔塔在北京LKK洛可可北京总部举行了主题为“闻·所未见”新品美杜莎耳机发布会,同期发布会中贝尔塔还发布了“铃铛-E100”、“胶囊-E300”以及“蜂巢-E500”三款式耳机。贝尔塔中华区总经理杨志刚、贝尔塔首席调音师郁志曰、
December 26, 2012, the domestic cutting-edge headset brand Bertha Beijing Lok Krokke Beijing headquarters held a theme for “smell nothing new” Medusa headphones conference, the same conference in Bertha also released “Bell-E100 ”, “Capsule-E300 ” and “Beehive-E500 ” three styles of headphones. Bertha Yang Zhigang, general manager of China, Bell Tower chief engineer Yu Chi said,