Welding defects inevitably exist in pressurized pipes used for transportation of oil and may cause safety problems as a result of decreasing the load-carrying capacity of the pipes.
压力管道往往不可避免地存在焊接缺陷，这些缺陷的存在会降低管道的强度，对管道的安全运行产生隐患。
The bogie frame, which is welded together, is the most important load-carrying component in a high-speed train. Its load-carrying capacity and status will influence safety of running trains.
高速列车转向架焊接构架是重要的承载部件，承载能力与状况直接关系到安全运营。
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