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| 资用〔工作，有效〕长度 | |||
| 有效长 (度); 资用长度; 工作长度; 使用长度 | |||
| 有效长度 | |||
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working length : 15 phrases in 8 subjects |
| Automobiles | 1 |
| Business | 2 |
| Construction | 1 |
| Information technology | 2 |
| Metallurgy | 2 |
| Technology | 3 |
| Telecommunications | 2 |
| Wind Energy | 2 |
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