Xinhua: China is to employ BeiDou satellite-based augmentation system in railway survey China will employ BeiDou satellite-based augmentation system (BDSBAS) to provide high-precision positioning service in railway survey and construction. 1w 02-20 17:24 READ MOST 北京多所高校禁用罗马仕充电宝 公司致歉：若有缺陷将依法担责 1.3w 06-15 13:15 POPULAR TAGS 罗马仕 安全 充电宝
