Qualification of welders and welding procedures for butt welds. Welder certification is based on specially designed tests to determine a welder's skill and ability to deposit sound weld metal.
ID: 1674995824
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- 大图:5191 × 3461 像素·43.95 cm × 29.3 cm·300dpi·JPG
- 中图:1000 × 667 像素·35.28 cm × 23.53 cm·72dpi·JPG
- 小图:500 × 334 像素·17.64 cm × 11.78 cm·72dpi·JPG