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| 41. | operator aborted |
| 操作员已放弃 |
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| 42. | drilling rig operator |
| 钻机操作员 |
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| 43. | operator control system |
| 操作员控制系统 |
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| 44. | operator set-up time |
| 操作员准备时间 |
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| 45. | thirty-second operator |
| 三十秒操作员 |
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| 46. | Photogrammetric Operator |
| 摄影测量操作员 |
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| 47. | keypunch operator |
| 键控穿孔机操作员 |
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| 48. | operator monitor |
| 操作员监控程序 |
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| 49. | intercept operator |
| 截听操作员 |
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| 50. | shotcrete robot operator |
| 喷射混凝土遥控设备操作员；遥控喷浆机操作员 |
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