As it is hânmjittich arc welding, earst fan alle, betelje omtinken oan it ûnderskieden smelten izer en coating. Observearje it smelte swimbad: de glânzjende floeistof is smelte izer, en wat derop driuwt en streamt is de coating. By it lassen, oandachtje om de coating net it smelte izer te litten, oars is it maklik ...
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