at-sea maintenance
... at full sea 绝顶 ; 满潮 at-sea maintenance 海上保养 Ending At The Sea 为止海 ...
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他们发挥了很大的作用，在检查，保养和维修海底设施，并形成了一个先决条件，定位和建设海上单位。
They have played a significant role in inspecting, maintaining and repairing sub-sea installations and have formed a pre-requisite for locating and constructing offshore units.
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