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| рівень обслуговування (The level of support that customer service is required to provide for a case. The service contract a customer purchases determines the service level for its associated cases) | |||
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Service Level : 6 短语, 5 学科 |
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| 微软 | 2 |
| 旅行 | 1 |
| 电信 | 1 |
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