navigation mark
短语词组
- navigation mark of periodical 期刊航标
- electronic navigation mark 电子航标
- Inland River Navigation Mark 内河航标
- navigation mark positioning 航标定位
- navigation mark management modernization 航标管理现代化
- Virtual navigation mark 虚拟航标
- navigation mark regulation 航标整治
- navigation mark monitoring system 航标监测系统
- visual navigation mark 目视航标 返回 navigation mark