Owing to the small diameters of conduit pipes and bracing tubes, the girth welding has to be done with onesidewelding both sides formation technology.
海洋平台构件中的导管、撑管，因管径小，其环焊缝只能采用单面焊双面成型焊接工艺。
2
This script of scientific and educational film (it has been filmed) describes briefly the commonly adopted manipulating techniques of onesidewelding by shelded metal arc.
本文用科教电影脚本（已拍摄成影片）形式，简明扼要地介绍了手工电弧焊单面焊接双面成形的几种常用手法；
3
A particular device of location and compaction for welding by oneside in shape by both sides was designed according to the enterprises requirement in steel plates butt joint.