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41. | airline computer tracing system |
| 航天计算机跟踪系统 |
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42. | tive laser tracking system |
| 主动激光跟踪系统 |
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43. | Customer Order Tracking System |
| 用户订单跟踪系统 |
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44. | semiactive tracking system |
| 半主动跟踪系统 |
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45. | precision automated tracking system (PATS) |
| 精密自动跟踪系统 |
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46. | fully automated cargo tracking system |
| 全自动货物跟踪系统 |
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47. | automatic station keeping syste |
| 电台自动跟踪系统 |
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48. | aircraft automatic tracking system |
| 飞行自动跟踪系统 |
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49. | active infrared tracking system |
| 主动红外跟踪系统 |
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50. | radio tracking system |
| 无线电跟踪测量系统 |
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