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油井作业结束后，油管常常出现沾满油污、水垢和铁氧化合物的现象。
After the oil operations, pipelines often appear oily, scale and iron oxides phenomenon.
在阿拉斯加，油井作业成本十分高昂，所以减少诊断和修复泄漏所需的时间对作业者来说意义非凡。
Being in Alaska, our costs are extremely high, so reducing the amount of time diagnosing and repairing leaks has a large value to us.
工业机器人在油井周围的海床上作业时需要强大的光源，但即便如此，光线也只能穿出几百米远，更远处浓重的黑暗无情的吞噬着一切。
The industry robots working on the seabed around the wellhead need powerful lights. Even then, the rays go only so far. Gloom quickly reasserts itself.
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