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41. | modular surveillance radar |
| 模块式监视雷达 |
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42. | infrared surveillance set |
| 红外线监视装置 |
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43. | sonar surveillance system |
| 声呐监视系统 |
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44. | en-route surveillance rader |
| 航路监视雷达 |
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45. | radar surveillance |
| 雷达监视|雷达对空观察 |
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46. | terminal surveillance radar |
| 终端二次监视雷达 |
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47. | no air surveillance, no car surveillance of any kind will be tolerated. |
| 空中监视,汽车跟踪,任何的监视都不行 |
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48. | d missile surveillance |
| 卫星和导弹监视 |
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49. | approach surveillance radar |
| 进场着陆监视雷达 |
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50. | air pollution surveillance system |
| 大气污染监视系统 |
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