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| 41. | rock-free terrain |
| 无石地区 |
|
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| 42. | terrain-following system |
| 地形跟踪系统 |
|
|
| | |
| 43. | synoptic terrain photography |
| 地表概要摄影术 |
|
|
| | |
| 44. | earth terrain camera |
| 地表摄象机 |
|
|
| | |
| 45. | digital terrain data |
| 数字地形资料 |
|
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| | |
| 46. | natural terrain obstacles |
| 天然障碍物 |
|
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| | |
| 47. | Terrain-avoidance radar |
| 地形回避雷达 |
|
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| | |
| 48. | a terrain reconnaissance |
| 地形侦察 |
|
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| | |
| 49. | Terrain-avoidance information |
| 地形回避信息 |
|
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| | |
| 50. | digital terrain file |
| 数字地形文件 |
|
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| | |