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Internet sites have plenty of resources for sale from Russia and Tailand for practicing on. Or just say "Sometimes two materials just can't be joined, unless the receiving material will take bra,zing techniques".
I dunno. Mabye mention (in better words than mine) that everyone has made welding mistakes in the past, and some need time to fully mature their skills in creating a good bond. That the most important ass,pects of the butt weld are to remove as much loose surface material as possible, really getting into the cleft, use heat for deep penetration of the rod, and wait for it to cool off before checking to see if it's stronger (or something like that).
Brother and good friend, eh? My condolences. Some skills are hard to demonstrate over a desk in an office.
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Meanwhile other things are still happening.
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