水下管道干式维修系统的基本设备是一套大型水下干式舱。
The "Underwater Pipeline Dry Repair System" is a National "863" Hi-tech project.
其双体船的每面船体都有水下管道，提供两种功能(见插图)。
Each hull of its catamarans has an underwater duct which serves two functions (see illustration).
用钻孔灌注桩加固水下管道具有适用性广、承载力大、建造费用低等特点。
The method to stabilize underwater pipeline with pile-support structure has the features in wide availability, heavy loading capacity and low construction cost.
油气管道铺设以后，需要定期或不定期的进行位置检测，特别是水下管道。
The underground oil and gas pipelines, especially the pipelines under the water, need steady or periodic-unsteady position inspection.
综述了水下管道焊接技术研究与应用的最新进展，并就水下焊接技术的发展趋势提出了看法。
So the paper summarizes the latest technological progress of pipeline underwater welding and points out its development tendency in the future.
本文通过对水下悬空管道的振动分析，利用水下管道的共振条件，导出了共振时管道悬空长度的计算公式。
The calculating formula for suspended length during resonance are derived made out through the analysis of the underwater suspended vibration pipeline and by the utilization of resonance conditions.
一种连接管道（3）以制造水下管路（2）的方法，其中两个相邻管道（3） 相互面对、沿着轴（A）对准的自由端（15）被焊接在一起，以限定一段修剪 区域（18）；
A method of joining pipes (3) to produce underwater pipelines (2), wherein the facing free ends (15) of two adjacent pipes (3), aligned along an axis (A), are welded to define a cutback (18);
一种连接管道（3）以制造水下管路（2）的方法，其中两个相邻管道（3） 相互面对、沿着轴（A）对准的自由端（15）被焊接在一起，以限定一段修剪 区域（18）；
A method of joining pipes (3) to produce underwater pipelines (2), wherein the facing free ends (15) of two adjacent pipes (3), aligned along an axis (A), are welded to define a cutback (18);
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