两件关键证据——飞行数据和驾驶舱录音器——仍未找到，可能已经沉入海底。
Two key pieces of evidence -- the flight data and cockpit voice recorders -- remain missing and could lie on the ocean floor. Map of Flight 447's flight path »
在海底管道维修领域，筒型基础可作为管道支承结构、维修舱基础及管道提升装置等。
In area of repairing pipelines, the suction foundation can be used as a pipeline supporting base going through a soft soil segment.
在海底管道维修领域，筒型基础可作为管道支承结构、维修舱基础及管道提升装置等。
In area of repairing pipelines, the suction foundation can be used as a pipeline supporting base going through a soft soil segment.
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