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Terms for subject Aviation containing procedures for air navigation | all forms | exact matches only | in specified order only
| English | Chinese |
| Procedures for Air Navigation Services | 航空导航服务程序 |
| Procedures for Air Navigation Services | 空中导航中心用程序 (英国) |
| procedures for air navigation services abbreviation and codes | 空中导航服务程序缩写及代码 |