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| 贝尔电话实验室; 贝尔电话研究所现属于 Lucent Technologies | |||
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| 贝尔实验室 | |||
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Bell Laboratories : 12 phrases in 4 subjects |
| Air defense | 1 |
| Electronics | 7 |
| General | 1 |
| Telecommunications | 3 |
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