To remove internal stress such as those produced by drawing, bending, or welding.

去除内应力，如用冲压、完全或焊接成型的工件。

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Cutting or welding of empty containers might cause fire, explosion or toxic fumes from residues.

切割或焊接空容器可能由于残留物质而导致火灾、爆炸或有毒烟雾。

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Boilermakers may specialize in rigging and hoisting, preparation and layout, or welding aspects of the trade.

锅炉工可能专注于本行业的索具和吊装，准备和布局，或焊接方面。

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The old way of making things involved taking lots of parts and screwing or welding them together.

ECONOMIST: Manufacturing

U.S. and Iraqi officials agree that smuggling of crude oil seems to be less than was previously thought, and some of the pipeline failures that were routinely put down to acts of sabotage may have been due to corrosion or faulty welding.

NPR: Iraq Oil Minister Vows to Fight Corruption, Smuggling

Randfontein is offering to arrange retraining for sacked miners, in welding or carpentry, for example.

ECONOMIST: South Africa