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| 41. | defense communication system |
| 国防通信系统 |
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| 42. | operational communication system |
| 作战通信系统 |
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| 43. | Alaska communication system |
| 阿拉斯加通信系统 |
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| 44. | interior communication system |
| 船内通信系统 |
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| 45. | airborne communication system |
| 空中通信系统 |
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| 46. | ergency communication system |
| 潜艇应急通信系统 |
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| 47. | facsimile communication system |
| 传真通信系统 |
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| 48. | intercomputer communication system |
| 计算机间通信系统 |
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| 49. | video communication system |
| 视频通信系统 |
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| 50. | multicomputer communication system |
| 多计算机通信系统 |
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