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| operating efficiency; operational efficiency; operation efficiency | |||
| functional capability | |||
| working efficiency | |||
| rate of operation | |||
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| operational efficiency | |||
| 操作 效率: 5 phrases in 4 subjects |
| Management | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Project management | 1 |
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