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| 数字数据交换设备 | |||
| 数字数据转换装置设备 | |||
| 数字数据转换设备 | |||
| 数字式数据转换装置 | |||
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digital data conversion equipment : 3 phrases in 3 subjects |
| Computers | 1 |
| Geophysics | 1 |
| Space | 1 |
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