welded tube

例句：

1. 1. The welded tube is used for heating oil in the furnace.
   焊接管用于炉内加热油。
2. 2.Welded tubes are commonly used in construction to reinforce concrete beams.
   焊接管在建筑中常用于加固混凝土梁。
3. 3. The welded tube is a crucial component of the pipeline system.
   焊接管是管道系统的关键组成部分。