- closed butt weld
- 连续: 6年未出事故. There have been no a ...
- 对接: abutment; abutting joint; bu ...
- 焊缝: soldering seam; weld bead; w ...
- t形对接焊缝: tee butt welding
- 对接焊缝: butt jointed shell course; butt weld; butt-jointed seam; butt-welded seam; upset welding joint; welding seam
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