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| 21. | aircraft designation |
| 飞机型号；航空器型号 |
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| 22. | scale designation |
| 标度标记|尺度标记 |
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| 23. | international designation |
| 国际编号 |
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| 24. | designation strip |
| 名牌|标条 |
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| 25. | runway designation |
| 跑道号码 |
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| 26. | unit designation |
| 部队番号 |
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| 27. | sheet designation |
| 图幅编号 |
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| 28. | designation marks |
| 书帖标记 |
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| 29. | area designation |
| 区域标记 |
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| 30. | classification designation |
| 分类代号 |
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