Offshore drillingplatforms extend the search for oil to the ocean's continental shelves—those gently sloping submarine regions at the edges of the continents.
海底钻井平台将寻找石油的区域延伸到了海洋大陆架——大陆边缘那些平缓倾斜的海底区域。
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Mainly used for marines and sea oil drillingplatforms.
电热带主要用于船舶、海洋钻井平台。
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Lights from offshore drillingplatforms twinkled on the horizon.