... layback 距离改正 lay-barge construction 前导铺管船法 lay-by footage 未列入钻井报表的进尺数 ...
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The reel-type lay barge was designed to lower offshore pipeline construction costs by increasing the laying rate and decreasing the time.
卷筒式铺管船可增大铺管速度并减少铺管时间，从而减少海洋管道的建设成本。
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