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| holding procedure (当等待进一步的飞行许可时，它用来使飞机保持在特定空域内的预定机动。它通常是跑道型的等待航线，其中所有的转弯都是左转或者右转。等待程序显示在标准的到达航图中。等待模式通常是以定位点或者导航设备为基础的。又称 holding pattern (等待航线)) | |||
| wait routine | |||
| 等待程序: 9 phrases in 2 subjects |
| Electronics | 5 |
| Technology | 4 |
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