顶部张紧立管（TTR）是用于连接运动的浮式生产设施和海床上的海底系统的管道，顶部张紧立管可用于钻井、完井及生产。
Top tension risers (TTRs) are used as the conduits between dynamic floating production units and subsea systems on the sea floor, for drill, complete or production facilities.
顶部张紧立管（TTR）是用于连接运动的浮式生产设施和海床上的海底系统的管道，顶部张紧立管可用于钻井、完井及生产。
Top tension risers (TTRs) are used as the conduits between dynamic floating production units and subsea systems on the sea floor, for drill, complete or production facilities.
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