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1. | average operation time |
| 平均工作时间 |
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2. | working hours |
| 工作时间 |
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3. | footage working time |
| 进尺工作时间 |
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4. | bottom working time |
| 海底工作时间 |
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5. | actual working time |
| 实际工作时间 |
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6. | operation use time |
| 有效工作时间 |
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7. | break-in operate time |
| 插入工作时间 |
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8. | continuous working period |
| 持续工作时间 |
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9. | normal working hour |
| 正常工作时间 |
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10. | service working time |
| 辅助工作时间 |
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