固定焊口

固定焊口 双语例句

1. 针对石油天然气长输管道焊接，采用焊口固定的全位置焊接，增加了大直径、厚壁石油天然气管道的焊接难度。
This paper is directed against long-distance pipeline weld of petroleum and gas pipeline, it is adopted with fixed joint and all-position welding, weld difficulty of large-diameter and pipe-wall of the pipeline is increased.