青云翻译

Root pass welding or tack welding before pipe ends should be closed to prevent the tube drafts. Tacking should be incorporated into the final weld ends to clean up and polish.

Before welding root layer or to locate-welding, pipe ends should be closed to prevent the Canal drafts, lack of. Positioning welded into the end weld should be cleaned and polished at both ends.

The welding root weld bead or carries on in front of the positioned weld, the jet should seal up, prevents in the tube the wind draft.The positioned weld merges when the final weld bead should carry on the cleaning up and the both sides polish.

welding root welding road or locate welding, before end-of-pipe should be closed to prevent the wind through the hall. When positioning welded into final welding road should be cleaned up both ends and polishing.

Before welding root layer or to locate-welding, pipe ends should be closed to prevent the Canal drafts, lack of. Positioning welded into the end weld should be cleaned and polished at both ends.