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关注：1
2013-05-23 12:21
求翻译：When compared with visual aids,radionavigation systemstypically have a greater coverage area and can be more cost effective if sufficient numbers of vessels carry the appropriate receivers.However,specific radionavigation systems include Decca,Omega,Rana and Toran是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
When compared with visual aids,radionavigation systemstypically have a greater coverage area and can be more cost effective if sufficient numbers of vessels carry the appropriate receivers.However,specific radionavigation systems include Decca,Omega,Rana and Toran
问题补充： |
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2013-05-23 12:21:38
当与视觉辅助相比，无线电导航systemstypically具有更大的覆盖范围，并可以更符合成本效益，如果足够多的船只进行适当receivers.However ，特定的无线电导航系统包括德卡，欧米茄，蛙和Toran
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2013-05-23 12:23:18
与去年同期比较时可视艾滋病、无线电导航systemstypically覆盖范围更大的区域,并且可以更具成本效益如果有足够数目的船只携带相应接收器.但是,特定无线电导航系统包括德卡、欧米茄、拉纳及toran
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2013-05-23 12:24:58
正在翻译，请等待...
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2013-05-23 12:26:38
正在翻译，请等待...
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2013-05-23 12:28:18
正在翻译，请等待...
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