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| Integrated Subscriber Digital Network | |||
| 一线通: 13 phrases in 10 subjects |
| Bridge construction | 1 |
| Commerce | 1 |
| Cryptography | 1 |
| Dentistry | 1 |
| Electronics | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Information technology | 2 |
| Oil / petroleum | 1 |
| Securities | 1 |