- a-n radio range
- 分区: subregion; subarea; partitio ...
- 式: type; style
- 无线电导航: radio navigation
- 设备: equipment; device; facility; ...
- 无线电导航设备: air navigation radio aids; radio aid to navigation; radio aids to navigation; radio and navigation equipment; radio navigation aids; radio navigation device; radio navigation equipment; radio navigational device; radio-navigation equipment; radionavigational aids
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