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英国水道测量组织新版图书书号描述版本出新时间是否有现货NP282(1)ADMIRALTY List of Radio Signals.Radio Aids to N待删除信息igation, Differential GPS(DGPS),Legal Time, Radio Time Signals andElectronic Position Fixing SystemEurope,Africa and Asia (excluding the FarEast). 2019/20 Edition.2019/ [详细介绍]