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| 操作支持系统; 运营支持系统; 工作支持系统 | |||
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| 运行支持系统 | |||
| English thesaurus | |||
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| OSS (TMN) | |||
| OSS (AT&T) | |||
| OSS (Telephony, AT&T) | |||
| OSS | |||
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| OSS | |||
| operation support system: 6 phrases in 4 subjects |
| Aviation | 1 |
| Electronics | 1 |
| Information technology | 3 |
| Rail transport | 1 |
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